Author:
exxtruder

Language:
C/C++

Upload:
2025-11-30 19:55

Platform:
Windows

Difficulty:
3.7

Quality:
3.2

Arch:
x86-64

Downloads:
61

Writeups:
0

Comments:
4

Description

First stage of the VM Crackme challenge. A very simple custom virtual machine, without obfuscation or encryption. The file deliberately contains extra compiler/linker information to make the task easier. Task: Generate a Name/Serial pair. The verification algorithm is very simple. Patching is not allowed.

• Comments (4)
• Writeups (0)

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BigLongs on 2025-12-05 23:37: User: abcdefghij Serial: GADJECFB The name must have exactly 10 lowercase letters a-z (it rejects anything outside this range). The program converts the name to uppercase. The serial number must have exactly 8 characters. The serial number positions must match the letters in the name (already in uppercase): S0 = Name[6] S2 = Name[3] S3 = Name[9] S5 = Name[2] S7 = Name[1] S1, S4, and S6 are not used in the comparisons (they can be anything).

dimkasi2 on 2025-12-06 08:08: sdk -- https://github.com/mashituladi-star/sdk-on-crackmes.one-exxtruder-VM-Crackme-Challenge-0.-Very-easy-VM

exxtruder on 2025-12-06 23:02: @dimkasi2: Great job! It's amazing how Claude makes our work easier! Get ready for the second stage of the trial!

exxtruder on 2025-12-06 23:02: @BigLongs: The algorithm is not entirely correct, but overall it works, nicely done!

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