crackmes.one

Zexty's Fsoecity key checker (very hard to reverse)

Author:
Zexty

Language:
.NET

Upload:
2026-08-20 15:54

Platform:
Windows

Difficulty:
6.0

Quality:
4.0

Arch:
x86-64

Downloads:
53

Size:
860.00 KB

Writeups:
0

Comments:
1

Description

FSOCIETY Crackme Challenge Your objective is to reverse the protected .NET application and recover the actual valid password accepted by the program. Password format: XXX-XXXXX-XXXX-XX The executable is protected with the private Cindermark Cipher 1.2.1 Beta obfuscator, featuring a custom virtual machine, control-flow transformation, encrypted runtime data, anti-tamper, and anti-analysis mechanisms. Any reversing method is allowed. The only rule: no keygens. Recover the original password and explain your approach. This challenge is for reverse engineers who think they can tear through anything placed in front of them. Prove it. Good luck. You will need it.

Labels ?

Anti-debugging String / data encryption Self-modifying / runtime decrypt Code virtualization / VM Control-flow obfuscation Anti-disassembly Anti-tamper / integrity Import / API obfuscation Custom / generic obfuscation