timotei_'s timotei crackme#9

Author:
timotei_

Language:
Assembler

Upload:
2023-06-29 17:30

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Platform:
Windows

Difficulty:
3.0

Quality:
5.0

Arch:
x86

Downloads:
12

Writeups:
1

Comments:
7

Description

This aims to advanced beginners. No overbloated insructions, no anti-debug-tricks, no packing, just clean code which should be good to trace. Find a working serial and try to create a keygen. Have fun.

Comments (7)
Writeups (1)

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nightxyz on 2023-07-11 13:36: [Click to reveal]

BeginnerCracker123 on 2023-07-14 13:01: i only can patch sadly, how to find the pass? i cannot find it in the dump and when i step into either not

nightxyz on 2023-07-14 13:33: @BeginnerCracker123 There is no stored password inside file.There is an algorithm which you must solve to get valid passwords. I wrote pascal program to find a valid password using algorithm and brute force and finally found one of them is 141157CM

cnathansmith on 2023-08-08 13:58: There is a small mistake in the writeup portion of my solution, where I stated that 'if "9999CMabcd" is a valid key, then so are the permutations "9999aCMbcd", "9999bcCMda", etc.' 'CM' must be at an even position in the serial. This is handled correctly in the keygen, I just forgot to update it in the writeup after realizing it. Note that 9999CMabcd isn't a valid key, just an illustrative example when explaining the permutations. If you want valid keys, run the keygen and you'll be lousy with them: 8823CMi 3077CM\ 2044CMJ 4003CMq 7146CMx ...

timotei_ on 2023-08-09 16:07: @cnathansmith: Thanks for your solution, well written with good explanations.

cnathansmith on 2023-08-16 15:19: Thanks!

seawolf on 2023-09-01 08:23: I had prepared a solution, in 10th of July, but for some reason I did not see it online. Anyway, I will share with you some of the keys I have found and wrote them in the unpublished paper which are not in the comments. 164685CM 247025CM 494052CM 9981CM39

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Solution by cnathansmith on 2023-08-08 13:49:
Full walkthrough with z3 python keygen to enumerate all valid serials

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crackmes.one

crackmes.one

timotei_'s timotei crackme#9