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[Question] Error Bypassing GetPixel

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kitterz
Grandmaster Cheater Supreme

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Joined: 24 Dec 2007
Posts: 1268

Posted: Thu Jul 10, 2008 9:03 pm Post subject: [Question] Error Bypassing GetPixel

I think one can bypass gg to use GetPixel by adding the 5 bytes like the postmesage bypass...right? Or am I mistaken?

Edit: Now I am getting the error

Code:

Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.

Anyone can help?

Last edited by kitterz on Fri Jul 11, 2008 9:09 am; edited 1 time in total

lurc
Grandmaster Cheater Supreme

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Joined: 13 Nov 2006
Posts: 1900

Posted: Thu Jul 10, 2008 9:05 pm Post subject:

Yes you are correct. _________________

oib111
I post too much

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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?

Posted: Thu Jul 10, 2008 9:07 pm Post subject:

Yea...

Code:

DWORD GPA = (DWORD)GetProcAddress(LoadLibrary("USER32.DLL"), "GetPixel")+5;

_declspec(naked) COLORREF GetPixelX(HDC hdc, int nXPos, int nYPos) {
_asm {
mov edi, edi
push ebp
mov ebp, esp
jmp[GPA]
}
}

_________________

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cigs dont make people high, which weed does, which causes them to do bad stuff. like killing

kitterz
Grandmaster Cheater Supreme

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Joined: 24 Dec 2007
Posts: 1268

Posted: Thu Jul 10, 2008 9:18 pm Post subject:

oib111 wrote:

Yea...

Code:

Thx but i already knew how XD

Symbol
I'm a spammer

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Joined: 18 Apr 2007
Posts: 5094
Location: Israel.

Posted: Thu Jul 10, 2008 10:21 pm Post subject:

oib111 wrote:

Yea...

Code:

jmp dword ptr ds:[GPA]

And you can simply do:

Code:

jmp dword ptr ds:[GetPixel+5]

or of this doesn't work:

Code:

mov eax,dword ptr ds:[GetPixel]
add eax,5
jmp eax

Flyte
Peanuts!!!!

Reputation: 6

Joined: 19 Apr 2006
Posts: 1887
Location: Canada

Posted: Thu Jul 10, 2008 10:30 pm Post subject:

Symbol wrote:

And you can simply do:

Code:

jmp dword ptr ds:[GetPixel+5]

or of this doesn't work:

Code:

mov eax,dword ptr ds:[GetPixel]
add eax,5
jmp eax

You are making the assumption that the IAT isn't also hooked.

Stylo
Grandmaster Cheater Supreme

Reputation: 3

Joined: 16 May 2007
Posts: 1073
Location: Israel

Posted: Thu Jul 10, 2008 11:25 pm Post subject:

btw thats's "Gdi32.Dll" not "User32.Dll" _________________ Stylo

kitterz
Grandmaster Cheater Supreme

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Joined: 24 Dec 2007
Posts: 1268

Posted: Fri Jul 11, 2008 7:35 am Post subject:

1qaz wrote:

btw thats's "Gdi32.Dll" not "User32.Dll"

Yep, I was wondering when someone was going to notice that XD

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