admin@offensivelearning.com's Exceptional Password

Author:
admin@offensivelearning.com

Language:
C/C++

Upload:
2020-08-06 10:03

Download

Platform:
Windows

Difficulty:
3.0

Quality:
3.0

Arch:
x86

Downloads:
17

Size:
110.00 KB

Writeups:
1

Comments:
10

Description

Find the password which is hidden "exceptionally" well inside the binary.

Comments (10)
Writeups (1)

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ker2x on 2020-10-20 06:01: the premise is obvious, now i have to learn more about "exceptional" reverse engineering :D

Mick on 2020-10-20 20:58: [Click to reveal]

Mick on 2020-10-20 21:31: And there's an interesting function at 0x401130.

ker2x on 2020-10-21 13:51: I really have trouble with exception. Mostly about knowing which function is called when. I'm suspecting there are multiple password and/or the "ho no!" message doesn't strictly mean that the password is wrong. But simply that "another" exception was raised. It's interesting to see how the program behave when the password is longer than 14.

admin@offensivelearning.com on 2020-10-27 07:01: @Mick Yes indeed. That is the hash!

4epuxa on 2020-11-14 19:55: I patched it but crackme outputs Congratz! then it closes. Is it normal?

4epuxa on 2020-11-16 20:09: [Click to reveal]

shiiion on 2020-11-23 19:34: Nice crackme, forced me to learn SEH.

ker2x on 2021-03-22 17:16: i gave up on this one. then today with a new friend with attacked this one and finally solved it \o/ the SEH was messing up our brain but we did it some how... we were close to giving up because our brain reached melting point. then, with the last function that needed RE : "wait... isn't this just a concatenation ? " yay \o/

as06zx on 2022-03-08 10:48: good for learning

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Solution by shiiion on 2020-11-23 19:25:
Uses SEH to hide functionality. Useful page that documents everything you need to know/review for this: http://bytepointer.com/resources/pietrek_crash_course_depths_of_win32_seh.htm

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crackmes.one

crackmes.one

admin@offensivelearning.com's Exceptional Password