A Dutch CTF event with a Training Mission to practice, and a real CTF after. Part of the European Cyber Security Challenge. The challenges were all high quality and good learning material

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WebReversingEncoding+150 points


Generate an icon from a password. Reverse the algorithm of an open source library to find a correct password and bypass the check

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ReversingScriptingCrypto+150 points

Watering System

A 3 part cryptography challenge with brute-forcing, XOR and reversing an encryption algorithm. Learn a lot of different crypto techniques in one challenge

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WebRCEFilter Bypass+321 points

File Upload (Training Mission)

A web challenge in the Training Mission, where we first bypass a login, and then upload a shell using some .htaccess tricks