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furtest.fr/content/writeups/2024/spookyCTF/reverse/my_assm_hurts/index.md
furtest 34634f73c1 Adds CTFs to content
Add CTFs from 2024 to the content, htb apocalypse, spookyCTF,
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2025-06-27 14:45:23 +02:00

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+++ date = '2024-10-28T09:17:00+02:00' draft = false title = 'My assm hurts' tags = [ 'reverse' ] +++

Intro

Name: my-assm-hurts
Description: As Mary was attempting to time travel, she slipped on a patch of ice and landed on her butt. While getting up from the ice, she found a cool-looking USB flash drive containing a file with some system code. Can you help Mary decrypt what information the file has?
Author: TomB

This will be reverse.

We get a file that looks like assembly or some intermediate compilation step, who would want to read that.

Solve

I asked chatgpt to solve the challenge for me, thank god it did, I really didn't want to read that.
There was a link to the original transcript but it's down now.

Retranscription

In the following I removed some parts where I was trying to see if it was possible to compile the file.

  • me : By analyzing the file tell me exactly what the program does
  • chatgpt : blablabla, By analyzing the character codes (strings like string8, string10, etc.), the program builds the text "NICE_{Hey_this_is_COOL}", blablabla
  • me (in my head) : Humm this looks like a flag however it is not the right format lets ask again
  • me : Are you sure this is the right string, analyze again to make sure (use a different method)
  • chatgpt : blablabla, the flag is NICC{hEy_th1s-is_Co0L}