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[tutorial] crackme.de keygen

 
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zart
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PostPosted: Tue Sep 11, 2007 9:14 pm    Post subject: [tutorial] crackme.de keygen Reply with quote

I just wrote this up today at work, figured you guys may like to read it.

It's about patching simple anti-debugs, nag screens, fishing a serial, making a keygen then fixing a bug in the crackme!

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haha01haha01
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PostPosted: Tue Sep 11, 2007 11:41 pm    Post subject: Reply with quote

y every1 post keygens.... its sooo boring... crackmes are way more fun.
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haha01haha01
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PostPosted: Wed Sep 12, 2007 7:35 am    Post subject: Reply with quote

its not that they are too hard... i can make keygens for most of them but... its kina boring.
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zart
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PostPosted: Wed Sep 12, 2007 7:51 am    Post subject: Reply with quote

haha01haha01 wrote:
its not that they are too hard... i can make keygens for most of them but... its kina boring.


Instead of complaining you could always make some. Or crack the ones what havn't been.

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haha01haha01
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PostPosted: Wed Sep 12, 2007 8:57 am    Post subject: Reply with quote

ye ur right...
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zart
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PostPosted: Wed Sep 12, 2007 9:05 am    Post subject: Reply with quote

besides if you look at the message I posted. This is a tutorial, not a keygen. It'd be kind of pointless to try and keygen this since I've posted the solution with it.
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tj102985
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PostPosted: Fri Sep 14, 2007 1:33 pm    Post subject: Reply with quote

ok so lets say i wana make a keygen for photoshop i can read this and learn how to make one?

does it say what tools are needed to do so?

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zart
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PostPosted: Fri Sep 14, 2007 1:59 pm    Post subject: Reply with quote

tj102985 wrote:
ok so lets say i wana make a keygen for photoshop i can read this and learn how to make one?

does it say what tools are needed to do so?


You should learn how to 1, program first, 2, basic cracking then you could start trying to analyze photoshop.

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oib111
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PostPosted: Fri Sep 14, 2007 7:20 pm    Post subject: Reply with quote

I never learned how to make my CrackMe's protected so it was always plain text ASCII. I mean using integers was easy. Or just using an variable to hold value. But I never really knew how to make CrackMe like uligors crackme.
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haha01haha01
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PostPosted: Sat Sep 15, 2007 4:43 am    Post subject: Reply with quote

oib111 wrote:
I never learned how to make my CrackMe's protected so it was always plain text ASCII. I mean using integers was easy. Or just using an variable to hold value. But I never really knew how to make CrackMe like uligors crackme.

its simple. use modified ascii values.
for example password is "a" and its ascii value is 97.
now the user entered character "b" wich is ascii 98. u do this:

if userinputascii-10==87 (wich is 97-10)
msgbox (u won)
etc etc etc.....

so now u configured a variable with a wrong ascii value. but the password stay the same because the user input is being somehow "decrypted" with the algo u choosed to encrypt password.
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