downloadbrowseGuetta's Fortress

Download, 39 kb (password:
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Hello there =)

Here's a little challenge for you to play with, not that hard, some logic and programming skills needed.

Have fun,

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

Published: 05. Jun, 2012
Downloads: 317


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Solution by redoC, published 23. jul, 2012; download (393 kb), password: or browse.

redoC has not rated this crackme yet.

Solution by HMX0101, published 20. jun, 2012; download (173 kb), password: or browse.

HMX0101 has not rated this crackme yet.

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Discussion and comments

07. Jun 2012
Does it use Internet comprobation?
I tried to found the comprobation jump, but I didn't find it
Any tip or hint?
07. Jun 2012
Hi ! Yes, to register you need an Internet connection :)
07. Jun 2012
@ranyeva: Please, read your PM's and stop investigations here.
17. Jun 2012
"Invalid activation code" ...pls give me a tip, how to construct last group of numbers in activatin code? should we use bruteforcing?
18. Jun 2012
Well done, you've done the first part :)

Okay, so you want a hint, let's say that if the last part is not controlled by the program but directly sent to the server, we can suppose that the server is only gonna focus on this part of the activation code. And since you can't know what the server is doing, yes, you should code a bruteforce.

But it can be a little challenging to bruteforce something when the returned value is dynamic ;)
20. Jun 2012
Excellent analysis of all the concepts inside HMX0101, good job mate !
21. Jun 2012
It's reaally hard, but I appreciate your submission. so I could see the solution. hmx0101. Thanks.
28. Jul 2012
Nice work on this redoC, thanks for your solution.
17. Dec 2012
just little note:
my keygen uses GetSystemTime()+2 for hour computing which sometimes not corresponds to the server time... so it should be altered additionally

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