downloadbrowsesharpe's Crackme #6 by sharpe

Download six.zip, 3 kb (password: crackmes.de)
Browse contents of six.zip

Hi there,

I wrote another relitively easy crackme. This is a little different that my previous crackmes in that there are a few exciting additions in it. Some of the code is obfuscated in six, including the serial-generation code as well as other “code” that may be of interest. I won’t say much more. After the unlock code has been found, type it in and it will de-obfuscate the serial generation code as with the two other challenges. If you enter an invalid code, the crackme will crash, as the de-obfuscation routine will contain garbage instruction sequences. After this bit has been complete it should be straight forward.

I hope you enjoy!
sharpe

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 26. May, 2009
Downloads: 497

Rating

Votes: 6
Crackme is boring.

Rate this crackme:

Send a message to sharpe »

View profile of sharpe »

Solutions

Solution by Skid Vicious, published 02. jun, 2009; download (18 kb), password: crackmes.de or browse.

Skid Vicious has rated this crackme as quite nice.

Solution by asterix, published 01. jun, 2009; download (19 kb), password: crackmes.de or browse.

asterix has not rated this crackme yet.

Solution by indomit, published 01. jun, 2009; download (8 kb), password: crackmes.de or browse.

indomit has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

indomit
27. May 2009		Nice crackme!
Found one of correct unlock codes, and fished key for one name :)
cobrasniper555
29. May 2009		I was able to find out the "Unlock Code" and found the check for the serial and the username. I can't however, trace or follow along just to see what happens. Olly gets stuck. Did you add an antiOlly trick in there somewhere? Anyhow, I'll be able to make a solution soon enough. Good keygenme! =]
tony
30. May 2009		aha!I have a mind,I find some magic data: for example, it must contain the "0040333a" data in code decoded,so easily guess it 's unlock code.
cobrasniper555
31. May 2009		Tony: If I remember correctly, your serial is compared to what's at that address as well. ;)
sharpe
Author
05. Jun 2009		>indomit: Thanks for taking the time to write a tutorial, it is well written and detailed.

>cobrasniper555: No there are no debuging tricks but remember that when you set a breakpoint, you add the byte CC to the code. I saw some debugging issued due to thise when testing my unlockme #8.

You may leave your comment, thoughts and discuss this crackme with other reversers here.
Acting childish will not be tolerated.
HTML and such will be left as-is, so don't try.