Hashcat is an advanced GPU hash cracking utility that includes the World’s fastest md5crypt, phpass, mscash2 and WPA / WPA2 cracker. It also has the first and only GPGPU-based rule engine, focuses on highly iterated modern hashes, single dictionary-based attacks, and more. This is the source code release.
You can download it from the following link: https://packetstormsecurity.com/files/download/148858/hashcat-4.2.1.tar.gz
Source: https://packetstormsecurity.com/files/148858/Hashcat-Advanced-Password-Recovery-4.2.1-Source-Code.html