Wepdecrypt is a wireless LAN tool based on wepattack that guesses WEP keys using an active dictionary attack, a key generator, a distributed network attack, and some other methods.
You can download it from the following link: https://packetstormsecurity.com/files/download/36848/WepDecrypt-0.5.tar.gz
Source: https://packetstormsecurity.com/files/36848/WepDecrypt-0.5.tar.gz.html

