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X-MAS CTF is the competition organized by HTsP with the purpose of learning and having fun while solving jeopardy-style challenges.

We welcome both beginners and experienced players alike! Hope you will have a great time and we wish you a Merry Christmas!

(All of the challenges are written by HTsP members)

CTF events

X-MAS CTF 20190.00
X-MAS CTF 20180.00
X-MAS CTF 201824.07
Related tags: web pwn php crypto rop hacking forensics android python xor des rsa c++ reverse engineering programming c engineering java go random exploitation misc pwnable exploit math nothing networking prng bash ios network pentesting guessing linux sql injection miscellaneous blind rev ctf frida lua it overflow pwntools superstitions vulnerability analysis rsa-crypto revesing reversing ropchain cryptography-rsa nc substitution attacks buffer warmup cipher rabin devops cryptanalysis suisse-switzerland reverse drugs audacity rot13 crt gauss tv watching matrix eval anti-debug chinese-remainder polynomial 1day / oeis function modular vector sanity check hexedit nim scraping