Crackmes

Author:
cbm-hackers

Language:
C/C++

Upload:
6:53 PM 12/19/2018

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Platform
Unix/linux etc.

Difficulty:
2.2

Quality:
5.0

Arch:
x86-64

Description

Another simple but tricky crackme.... enjoy!!

Comments
Solutions

Yuri on 11:44 PM 12/25/2018: Its a good one, just took some time to look at.

cbm-hackers on 4:49 PM 12/26/2018: so how you do it?

Yuri on 6:33 PM 12/27/2018: @cbm-hackers I did post solution :) How close was the reverse engineered code? I think strcat_str() is pretty same as yours, everything the idea is there.

cbm-hackers on 3:02 AM 12/28/2018: Yes its almost the same....good job

SarkastikRival on 5:28 PM 07/06/2019: Just getting started with RE. This was a very good beginner level!

phnixir on 12:03 PM 09/12/2020: first level 2 crackme i solved! very nice beginner level crackme

You must me logged to submit a solution

Solution by Yuri:
This is solution. Text file contains explanation of crackme, C source code, and Assembly with comments.

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Solution by c1:
A simple Z3 solver based solution, overkill? sure..

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Solution by vastopol:

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Solution by redkage:
Found it using Cutter + IDA. Mostly IDA for debugging and checking the cmp values to understanding what was going on. And Cutter to decompile and have a better overall view of the program. Solution and explanations attached

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crackmes.one

crackmes.one

cbm-hackers's jumpjumpjump