(Collaborative post by Mateusz “j00ru” Jurczyk, Gynvael Coldwind and Adam Iwaniuk)
Friday, the 7th of September 2012 we were supposed to play the securitytraps.no-ip.org CTF. Unfortunately, the competition was postponed for a later date at the last moment, due to some significant technical problems. Next day evening we accidentally discovered another CTF taking place – the nullcon 2012 CTF, which sadly had already started one day earlier. Nonetheless, there were still 24 hours until the end, so we decided to give it a shot. TL;DR: We ended up 3rd (Team 41414141).
Below we describe a few of the tasks in more detail, plus briefly note what was the idea behind the solution to the other challenges we managed to solve.