downloadseVeb's crackme1

Download crackme01.tar.gz, 5 kb

This is my first submission, find the secret number and explain how you solved it in a short tutorial. The main goal is to find out what the secret number is, not to crack it to show good boy.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Mar, 2014
Downloads: 568


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Solution by exe.surgeon, published 26. mar, 2014; download (3 kb), password: or browse.

exe.surgeon has rated this crackme as nothing special.

Solution by xtofs1, published 22. jan, 2014; download (3 kb), password: or browse.

xtofs1 has not rated this crackme yet.

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Discussion and comments

04. Jan 2014
Nice beginner crackme, I enjoyed solving it! (Warning: at the time of writing, the 32bit version did not work as intended, but the 64bit version did)
08. Jan 2014
Please remove the 32 bit version I also had problems with it ...
10. Jan 2014
Is the 32 bit version broken? I've been trying to solve it for a while, got close but it seems that when my number is converted its no longer null terminated therefore doesn't match the string that its checked against...
10. Jan 2014
OK, I'd solved it ages ago, yes the 32bit version is broken! :-/
10. Jan 2014
I know it is super annoying !
29. Jan 2014
Any tips for a complete newcomer about how one should approach things like this? I fired up my gdb, got some breakpoints assigned and figured out what's going to scanf(). After that I simply got stuck and wonder am I approaching this from a wrong angle (ie. should I be doing something else than reading disassembly output of gdb)?
10. Feb 2014
Tips would be to look at the big picture. Where is the success call? How many ways can you get there?
22. Feb 2014
I am very sorry for the broken version, I am new to C and did not test it throughly, sorry for the inconvenience!
03. Apr 2014
Solved my first crackme ^.^ Thank you!
I used IDA free and the 32bit version.
26. Jul 2015
That's not too evil. I enjoyed it. Thanks!

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