cowpatty
Brute-force WPA dictionary attack
Platforms: Linux · Last verified September 6, 2026
If you are auditing WPA-PSK or WPA2-PSK networks, you can use this tool to identify weak passphrases that were used to generate the PMK. Supply a libpcap capture file that includes the 4-way handshake, a dictionary file of passphrases to guess with, and the SSID for the network.
Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.
Getting started
Install on Kali Linux with `sudo apt install cowpatty`. See the official Kali tool page and upstream homepage linked above for full usage and configuration details.