• Last week I gave a talk during the Password '13 security conference on various password analysis and pattern detection attacks using the Password Analysis and Cracking Kit. You can download slides for the presentation here.

    The conference itself was an absolute blast with great organization by Per Thorsheim and Jeremi Gosney. The conference gathered a fascinating crowd which spawned hours of great discussions on password security, cryptography, politics and everything in between. However, I especially enjoyed meeting in real life with many members of Team Hashcat.

    Team Hashcat had another great run at the CMIYC during Defcon where we placed 2nd. As always I ended up spending most of the conference in the hotel room or the chill room at Defcon, but that's part of the fun doing contests. Russia-based team Inside-Pro placed first by scoring more points on harder hashes, молодцы ребята!

    Today, I have finally finished writing documentation for the many changes and adding the final polish to the next release of PACK 0.0.4. There should be noticeable performance bumps for all of the tools in the toolkit especially Rulegen which is now finally using multiple CPU cores. You should also try out the completely rewritten 'maskgen' which is now capable of generating highly optimized mask collections for use with Hashcat suite of tools (see presentation slides above for more details). Enjoy and most importantly have fun with password cracking!


    password analysis and cracking kit

    Download PACK-0.0.4.tar.gz
    Size 68.8 KB
    DateAugust 8th, 2013

    PACK (Password Analysis and Cracking Toolkit) is a collection of utilities developed to aid in analysis of password lists and enhancing cracking of passwords using password pattern detection. It can be used to reverse word mangling rules, generate source words, optimize password masks, craft policy attacks, etc. for the Hashcat family of tools. The toolkit itself is not able to crack passwords, but instead designed to make operation of password crackers more efficient. Read more.

    automatic password rule analysis and generation

    The field of password cracking has evolved by leaps an bounds over the last decade with the introduction of new cracking techniques, more advanced software and significantly faster hardware. One area which I find most fascinating is rule-based cracking. An attacker can develop a set of word mangling rules (e.g. substitute all 'a's to '@'s, upper-case every third letter, etc.) in order to attack non-random passwords which use slightly modified dictionary words. The purpose of this research is to develop an automated method of analyzing a large body of leaked passwords in order to come up with a list of frequently used words and rules to make up passwords. Read more.

    07 aug
    crack me if you can

    I had an opportunity to participate in the "Crack me if you can" password cracking competition during this year's Defcon. It was a fun and educational experience. Using a couple of video cards, decent processors as well as some research into password generation I was able to place 4th in the contest. In this post you can learn more about hardware, software and strategy used to crack about 25k passwords in two days. Read more.

    26 apr
    password analysis and cracking kit

    A product of my research into password cracking methods, PACK (Password Analysis and Cracking Kit) is a collection of several utilities to assist in statistical password analysis and generation of cracking rule sets. Read more.


    All original content on this site is copyright protected and licensed under Creative Commons - Attribution, NonCommercial, ShareAlike 4.0 International.