Share how awesome the crackme was or where you struggle to finish it! Stay polite and do not spoil the solution/flag!
Please keep the comments section English-only.
Author:
lastemoboy
Language:
C/C++
Upload:
2026-03-30 12:18
Platform:
Windows
Difficulty:
5.0
Quality:
4.0
Arch:
x86-64
Downloads:
101
Size:
30.50 KB
Writeups:
0
Comments:
0
Description
================================ RULES ================================ - Write a keygen (not a patch). - The keygen must accept any username (4-64 chars) and produce a valid serial. - Serial format: XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX (8 hex groups) ================================ DESCRIPTION ================================ A custom virtual machine-based crackme with multi-layer protection. The binary reads a username and a serial key from stdin, then runs them through several verification stages before printing "Access Granted" or "Invalid License". Hints (in no particular order): - There is more than one VM involved. - Not everything you see is real. - The same operation may behave differently in different contexts. - Static analysis alone will not give you the full picture. Good luck. ================================ NOTES ================================ - No anti-debug or packing — pure algorithmic protection. - No network access required. - Runs in a standard console (reads from stdin).