[keygenme] diablo2oo2's Crackme #10

[diablo2oo2]

diablo2oo2's Crackme #10

-----------------------------------------+

name: d2k2.crkme.10.exe

size: 19 kb

code: masm32

date: 21.04.2009

-----------------------------------------+

About:

A new keygenme for advanced keygenners.

Try to make a real keygen! Don't give up!

-----------------------------------------+

Rules:

1) No patching

2) Find serial for your name

3) Make a Keygen =)

-----------------------------------------+

Solutions go here:

e-mail : diablo2oo2[at]gmx[dot]net

i will upload only solutions with

included sourcecode. A tutorial is

optional.

Download the crackme here: http://diablo2oo2.cjb.net

Edited April 21, 2009 by diablo2oo2

[till]

Hi diablo,

A really funny keygenme, wasn't too hard though.

I like the problem behind it.

But sadly it has a mayor flaw in it (I assume you didn't want that.)

004012FB |. 57 |PUSH EDI

004012FC |. E8 47350000 |CALL d2k2_crk.00404848

00401301 |. E8 A2350000 |CALL d2k2_crk.004048A8

Overwrite all 16 bytes in EDI after the calls, you know what else happens.

d2k2_10_keygen.rar

Edited April 22, 2009 by Till.ch

[diablo2oo2]

Hi diablo,

A really funny keygenme, wasn't too hard though.

I like the problem behind it.

But sadly it has a mayor flaw in it (I assume you didn't want that.)

004012FB |. 57 |PUSH EDI

004012FC |. E8 47350000 |CALL d2k2_crk.00404848

00401301 |. E8 A2350000 |CALL d2k2_crk.004048A8

Overwrite all 16 bytes in EDI after the calls, you know what else happens.

good job. its also possible to code the keygen without the "s*d***" solver. i could made the matrix bigger, then the solver would be to slow. you can also use a solvingmatrix, once you solved this puzzle, because its a special puzzle case.

the problem with the bytes in edi is not a real problem. the other checks before solve this problem. i know about it.

Edited April 22, 2009 by diablo2oo2

[till]

Okay seems it wasn't clear to you what I meant with the flaw,

This keygen "exploits" this flaw, without paying attention to any matrix.

Cheers

d2k2_10_keygen_flaw.rar

[diablo2oo2]

Okay seems it wasn't clear to you what I meant with the flaw,

This keygen "exploits" this flaw, without paying attention to any matrix.

Cheers

now i understand. thank you.