One used Excel with VB, another used AutoIT, and yet another wrote his own C#. What was cool about this CTF is that while a number of my associates participated not one of us approached the challenge the same way. The challenge was therefore to recover the message and paste it as the answer for glory and prizes (not really, but pride points count). The BMP was modified to carry a message starting at the 101st byte and only in every 3rd byte thereafter. The challenge included only a legitimate bitmap file (BMP) that had been modified via least siginficant bit (LSB) steganography and the following details. In order to bring balance to the force I felt I should share with you my recent use of sed, "the ultimate stream editor" and awk, "an extremely versatile programming language for working on files" to solve one of fourteen challenges in a recent CTF exercise I participated in. Fresh off our discussion regarding PowerShell, now for something completely different.
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