Password Analysis and Cracking Kit by Peter Kacherginsky (iphelix) PACK (Password Analysis and Cracking Toolkit) is a collection of utilities developed to aid in the analysis of password lists to enhance password cracking through pattern detection of masks, rules, character sets, and other password characteristics. The toolkit generates valid input files for Hashcat family of password crackers. NOTE: The toolkit itself is not able to crack passwords but is instead designed to make the operation of password crackers more efficient.
Source code and additional information can be found here: https://github.com/iphelix/pack