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defc0n

RCE#2

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Question

defc0n

Difficulty: 3 (Normal)
Language: Delphi
Platform: Windows x32/x64
OS Version: Windows  XP,  Win7, Win8, Win 8.1, Win10
Packer / Protector : none

Description :

Hi guys, presenting my new creation.

The only solution is a working keygen as always!.

Patching is not allowed.

 

Prizes:

1) Keygen: Gold

2) Serial: Silver

 

 

Winners:

To be decided...

 

Screenshot :

rce2.JPG.298417b243a8c10b097a9dafa1add3e8.JPG

 

Have fun!

 

Regards

defc0n/2k17

RCE2.zip

 

Edited by defc0n (see edit history)
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VirtualPuppet
2 hours ago, GautamGreat said:

i am stuck at VA : 00455224

It looks like a procedure where generates a valid serial number. I stucked here. It is so complex for noobs like me. Can some one please explain how this algo works.

It takes a serial-number vector (the parsed serial number) and the name-checksum string, then runs the algorithm on them to produce what is supposed to yield the same result as the name-hash.

If the hashes are identical, the serial is considered "correct".

Here's the full solution for reference: https://pastebin.com/6KCfACR4

Edited by VirtualPuppet (see edit history)
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VirtualPuppet

image.png.b71949e768f2fa5496bd58b8f574ad98.png

Edited by VirtualPuppet (see edit history)
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Hero
Spoiler

Serial.png.9f0c9c3fa5f7fb1bed873e6ac40247fd.png

That was a tricky one.

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GautamGreat
2 hours ago, Hero said:
  Reveal hidden contents

Serial.png.9f0c9c3fa5f7fb1bed873e6ac40247fd.png

That was a tricky one.

Great work

How did you do that? Some information will be appreciated. 

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Hero
1 hour ago, GautamGreat said:

How did you do that? Some information will be appreciated. 

What can I say here? I simply learned the correct format of the key. It was a piece of cake to work backwards after that, hardware breakpoints are great. I eventually learned the algorithm and how long the correct serial should be.

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defc0n

 

20 hours ago, Hero said:
  Reveal hidden contents

Serial.png.9f0c9c3fa5f7fb1bed873e6ac40247fd.png

That was a tricky one.

 

Superbly done! Looking forward to your keygen and tutorial :):)

 

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GautamGreat

i am stuck at VA : 00455224

It looks like a procedure where generates a valid serial number. I stucked here. It is so complex for noobs like me. Can some one please explain how this algo works.

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