Most commented posts

  1. Codegate 2014 Quals – Minibomb (pwn 400) — 12 comments
  2. 1st Crypto CTF 2019 – Least Solved Challenges — 9 comments
  3. Codegate 2014 Quals – Angry Doraemon (pwn 250) — 9 comments
  4. Hack.lu 2012 CTF Challenge #14-15 (150+250) — 8 comments
  5. Hack.lu 2012 CTF Challenge #17 (400) — 7 comments

Author's posts

Sep 15

Leet More 2010 Noise Magic writeup

I think there’s nothing interesting in this image. Do you agree? image The image looks like it’s just a random noise. To make sure, we can measure a randomness. Pixels of each color can appear in each place of the image with equal chance. If it’s false for some colors, we certainly want to look …

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Sep 14

Leet More 2010 Stack or what? writeup

We received a new CPU model, you are to make a vulnerability check. Enter the CPU secret code as a proof. [ ctf.ifmo.ru:3123 ] + binary Here we have a VM with a few instuctions: nop, add, xor, mul, push, pop, loop, pops, pushs and core. The most intresting is core – it spawns a …

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