PoisonTap exploits locked/password protected computers over USB, drops a persistent WebSocket-based backdoor, exposes an internal router, and siphons cookies using Raspberry Pi Zero and Node.js.
You can download it from the following link: https://packetstormsecurity.com/files/download/139767/poisontap-master.zip
Source: https://packetstormsecurity.com/files/139767/PoisonTap-Backdoor-Network-Sniffer.html

