Author:
r0B

Language:
Assembler

Upload:
1:16 PM 11/22/2020

Download

Platform
Windows

Difficulty:
2.5

Quality:
5.3

Arch:
x86

Description

I hope you have fun figuring out the logic in this crackme. At first it might seem broken, but don't give up, you're near the end! -= no patching =- #Bonus points if you make a keygen!

• Comments
• Writeups

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jeffli6789 on 4:07 PM 12/05/2020: This one is interesting! It uses a small and novel obfuscation trick to confuse the reverser.

korsader on 9:31 AM 12/11/2020: Thank, you it was fun.

H2o on 7:36 PM 12/15/2020: Interesting stuff! Thank you

md5inj on 3:43 PM 12/26/2020: Thank you. Very interesting crackme. After day of debugging i thought "Finally i'm free", but after running the solution with "right" key i was very angry)))

Luc@s on 11:18 PM 12/26/2020: Thank you, it took some time of fun =D *Just a point that i saw in the first solution, the key doesn't not necessary ends with "I". Example: lucas@gmail.com 7357231K

korsader on 9:37 AM 12/27/2020: # python.org ml=input('input email address: ') if len(ml)4 print('%X'%b,end='') c=(ord(m)^x[i])&0x0F if c9: c+=0x47-9 else: c+=0x47 print(chr(c)) i+=1 input('press any key to exit')

korsader on 9:39 AM 12/27/2020: обрезал код сука

bus@cu on 11:12 PM 01/09/2021: I made a registry error I put EAX in place of the EBX registry (lines 108 to 110) in my solution. Thank you for replacing it with this one : and ebx,15 add bl,71 mov byte ptr[szSr+7],bl

ReiVanBjair on 4:07 PM 03/10/2021: I am curious how this happens in OllyDbg. The EIP clearly pushes the "Thank you for supporting" message yet the message still appears as "Invalid license key". How is this trick done?

pranav on 4:31 PM 04/30/2021: that was clever! Especially that you modifying an inbuilt function that causes 'abnormal' behavior! How did you even do that?

kekstraback on 8:06 PM 08/07/2022: This was a fun crackme to solve! Thanks :)

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