RodrigoTeixeira's Very easy disassembly execise

Author:
RodrigoTeixeira

Language:
C/C++

Upload:
2025-08-18 15:29

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Platform:
Windows

Difficulty:
1.1

Quality:
3.0

Arch:
x86-64

Downloads:
70

Size:
39.89 KB

Writeups:
4

Comments:
14

Description

Retreive a hard coded int from the executable. Good luck.

Comments (14)
Writeups (4)

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_Vas on 2025-08-18 17:51: [Click to reveal]

engraver1918 on 2025-08-18 19:10: Open Ida, you can see the password

zkdev on 2025-08-18 22:07: Open it with IDA. When you check the cmp instruction in main function, you will see a hex value (1E790h). Convert it to decimal and enter that.

mealysex on 2025-08-24 22:37: Где найти пароль от архива?

feverstudy8 on 2025-09-06 09:25: The instructions mov [esp+4], eax and mov dword ptr [esp], offset aD are used to pass arguments to scanf, differing from the usual push-based parameter passing.

Conper on 2025-09-06 16:03: cmp eax,1E790 That means our input is being compared with the value 1E790, which is in hexadecimal. If we convert it to an integer, we’ll get the password.

dogeploit on 2025-09-09 21:26: cwacked

iwannabecoder on 2025-09-14 19:14: [Click to reveal]

h0td04ek on 2025-09-23 18:48: [Click to reveal]

PL45M4 on 2025-10-06 03:42: Glad I wasn't the only one who thought the way arguments were being passed was strange. @iwannabecoder, open a command prompt and navigate to the directory you're storing the crackme in. Then execute the program using the command prompt. cd /Downloads crackme.exe When your password is incorrect, you will not see any output. Here's my writeup: https://bobbyhillreverseengineering.blogspot.com/2025/10/rodrigoteixeiras-very-easy-disassembly.html

FailButWin on 2025-10-22 10:53: Open it in any disassembler and look at the main function :)

RetroHub on 2025-10-26 07:44: [Click to reveal]

Zejzz on 2025-10-31 15:11: nice easy crackme, good one to try when using ghidra for the first time

phlxsk8r on 2025-11-01 11:09: This was pretty neat :D

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Solution by karabatik on 2025-08-18 16:59:
Static analysis of the main function shows a simple hardcoded comparison with value 124816. Password = 124816.

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Solution by torment on 2025-08-21 09:06:

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Solution by Hussam on 2025-10-06 20:56:
Detailed write-up , helpful for assembly trace

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Solution by dollhead on 2025-10-09 03:10:
Decompiling the main function shows a line where user input is compared to a hard-coded integer. Converting that integer into decimal form provides the answer! :)

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crackmes.one

crackmes.one

RodrigoTeixeira's Very easy disassembly execise