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[ CyberLock ] License System CrackMe Challenge


Shade Of Vengeance
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Shade Of Vengeance

[ CyberLock ] License System CrackMe Challenge


Hi, This is a simple crack me challenge protected by my own crafted packer, I don't know how hard is to break it but I assure you it's a good challenge.

 

Challenges

Pro Mode : Break the license checking system and find the key, activate the program, It will give you a quote of a famous philosopher, post a screenshot from it here, Share your solution if possible.

God Mode : Crack the license checking system and patch it to accept any key as a valid key, Share the cracked file. Share your solution if possible.

If you need hint and more details about protector visit Authors Solution tab.

 

VirusTotal/SHA-256 : 76ac442b0596f4008ddebd54e2cbaa5e14c7bf1bcad33cdf8c9db025eb8bd719

MD5 Hash : dd51f0ded36e54241d3a8c14d6e49852

SHA-1 Hash : c19856e4a7b91ed6798d14003a8e981220e756c0

File Password : tuts4you

 

Regards,

Good Luck!


 

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  • 3 weeks later...
  • Solution
Identity

This may seem difficult when looking at the protection but in reality this is very easy.

We can do both challenges at the same time.

First enter a random license key then put a BP on memcmp in msvcrt.dll then click Activate License!

We can already see our real Password → image.png.ade10a82c764d0be3451d412925c4f30.png

image.png.2b450dea2c53f7418a25fdbc1ed3da70.png

image.png.7e7082ff787994c582aae850d0bef8db.png

Pro Mode : Done.

Now run to user code and we can see that we land directly where it decide if it goes to the badboy or the goodboy.

image.png.6549d380603cd4d06063a2306c241208.png

Patch the jmp to make it accept any license code.

God Mode : Done.

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Shade Of Vengeance
5 hours ago, Identity said:

This may seem difficult when looking at the protection but in reality this is very easy.

....

Pro Mode : Done.

God Mode : Done.

Great job Identity and thank you for your time! I will be thankful if you follow and try my next crackme releases. Have a great day!

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