Since we generally like to tease about what we're working on next as we get too excited to wait for the public release, here's something we think is pretty neat. We decided to play around with visualization for some recent cryptanalysis work on some Microsoft Office .doc, Powerpoint and Excel files.
Take a look at the lines in the below chart - the green horizontal line represents a frequency plot of the top character occurrences over a 256byte spectrum in an office document which contained a one byte XOR'ed embedded executable virus. The red line is even more interesting, it represents the same, but where 256 byte XOR key was used to hide the malware. The blue scatter is the statistical analysis of a clean document with no malware. We thought it was pretty neat that when you visualize your cryptanalysis the documents with malware came up with straight lines in a lot of cases, and clean documents look almost random. More to come in the form of blazing fast cryptanalysis and Office docs :)