According to the challenge text this was a re-implemented challenge first seen at the AISA 2015 CTF. Since that was an onsite event I had not seen or heard of it before. So I approached it as a new challenge.

Defcon Quals 2016 were held over the weekend, while I didn’t qualify for the finals (any teams wanting a stand in ? Let me know ) I did become intrigued by the CGC challenges that were presented. Today I’m writing up the solution to LEGIT_0003. The most basic of the CGC challenge binaries (CB). I’m going to write it from a complete dummies perspective because that’s what I was (AM).

Defcon is over for another year. Well I think the guys went ahead and redefined what constitutes a good CTF yet again. Hard and focused, but very good and I don’t know how I feel about going back to other CTFs now. Still let’s move forward with a discussion about these trio of Cyber Grand Challenge binary problems we received over the weekend.

Cool challenge this one based on an interesting article published recently. We’re given the following clue