Elzzie's winkeygenme

Author:
Elzzie

Language:
.NET

Upload:
2026-06-04 21:25

Download

Platform:
Windows

Difficulty:
2.0

Quality:
4.0

Arch:
x86-64

Downloads:
27

Size:
160.08 KB

Writeups:
1

Comments:
1

Description

pretty simple keygenme made to look like windows activation. find out how it generates the key and make a keygen.

Comments (1)
Writeups (1)

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koray105 on 2026-06-08 21:01: Nice WPF crackme! Perfect for practicing .NET single-file binary extraction. Analysis and Solution: Extraction: The executable is a native .NET 8.0 single-file bootstrapper. By scanning the binary, we can find the inner managed PE header at offset 0x25000 (which is Cr4ckM3.dll). Reversing the Logic (F06 Method): The username must be at least 6 characters. The application computes the SHA-256 hash of the username. It maps each byte of the hash using a custom 256-byte S-Box (referenced in metadata as struct 59DCA538572A233693BB774EEF01D8C86B4190C6E5A37A2785F89BDC1BABA5D2). The permuted hash is encoded using a custom Base32 alphabet: ABCDEFGHJKLMNPQRSTUVWXYZ23456789. Finally, it takes the first 25 characters and formats them with dashes: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Valid Credentials Example: Username: crackmes.one Serial Key: TNL3M-G6CE5-75H2T-8A4U5-8Z4D2 Username: Elzzie Serial Key: AYH35-G85GW-P55TE-TJNJ4-CNLNA Thanks for the challenge!

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Solution by SingleJingle11 on 2026-06-08 09:56:

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