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 Tuesday, March 31 2020 @ 09:40 PM CEST

Bispoo Keygenme#1


CrackmesLevel : 1/10
OS : windows
Language : ASM

Bispoo Keygenme#1This is my first Crackme! Its all Written in Assembler, Everything is allowed,
you can patch etc, write a small txt how you've done it,
if you bother, write a keygen , that's all. Hope u enjoy it!

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Bispoo Keygenme#1 | 4 comments | Create New Account
The following comments are owned by whomever posted them. This site is not responsible for what they say.
Bispoo Keygenme#1
Authored by: cozofdeath on Thursday, July 17 2008 @ 01:37 AM CEST
Damn nice crackme! The anti-bp, anti-patch, and anti-debugger tricks were awesome. I don't think I've done one like that before. It looks like you spent some time on it. I've learned some good stuff and wish I knew enough to make a decent keygen for ya. Here's what I caught serial fishing.


When I began debugging Olly gave me the code empty message and I immediately though it was packed until I seen the code. Is that why you decided to change the EP?
Bispoo Keygenme#1
Authored by: cozofdeath on Thursday, July 17 2008 @ 02:05 AM CEST


  • Open the KeyGen in Olly.
  • Click on the code in the CPU window, select "Search for", "All intermodular calls". Breakpoint all GetDlgItemTextA's.
  • Run the program and type in a username between 4-15 chars and a password. Olly will break.
  • Trace (F8) though until you get past the JMP. You should now be able to see the 402284 offset which is the beginning of the serial routine. If you trace a little further till 4022e3 you find the last part of the serial routine. It XORs DL with 0xBE.
  • Under that instruction it compares AL and DL. DL will contain the correct password character.
  • So if you change the JE and INC instructions under the compare to keep looping and incrementing ECX you will be able to see the full password in DL.


  • Bispoo Keygenme#1
    Authored by: LCfer on Sunday, July 20 2008 @ 07:57 PM CEST
    I made a simple SelfKeygen. Plz check it out! :)

    İş°¨¨°şİİş°¨¨°şİ LCfer İş°¨¨°şİİş°¨¨°şİ

    Bispoo Keygenme#1
    Authored by: eraser on Sunday, August 31 2008 @ 05:47 PM CEST
    Bispoo what's wrong with INERTH? :)

    the real failure is when you don't learn anything from any given situation
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