EHVSN hack challenge 4
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EHVSN_Challenge4.exe
TechKnow.ico
challenge4.png
crypto01.txt
crypto1.bat
crypto1.cpp
crypto1.ico
readme.md
solution.png
solution_challenge4.png
unzip.cpp
unzip.h

readme.md

alt text

This is the full source of the 4th EHVSN hacking challenge.

The puzzle:

  • When you start the challenge, it will generate only chunks of the password, nothing else.
  • Use a debugger on this butterfly.
  • 1+3+2+4==1+2+3+4
  • The butterfly is the key to the other butterfly.
  • The butterfly's key encrypted will decrypt the other butterfly.
  • Your goal is to retrieve the “Challenge Code”
  • The first one to post the correct code on our EHVSN Facebook page has officially won

Level:

Between intermediate and pro

Required skills:

  • debugging
  • basic file handling
  • basic cipher
  • logic

Solution:

alt text

Read the file crypto1.txt for the solution details to the challenge.

Languages used:

  • C++ (GC++)
  • Batch script

Techniques used:

  • Simple password string obfuscation
  • Basic Stenography
  • Various ciphers

Website:

https://www.techknow.one/wiki/doku.php?id=wiki:challenge4