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IsDebuggerPresent bypass how?

 
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Palimpalim
Newbie cheater
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Joined: 02 Jan 2012
Posts: 23
Location: Deutschland
PostPosted: Tue Aug 04, 2015 3:33 pm    Post subject: IsDebuggerPresent bypass how? Reply with quote
How can i bypass the KernelBase Debugger? (Kernel.jpg)
I try it with NOP the parts but game still closing after try to debugging.
Try it with:
Code:
mov cl,0
mov byte ptr [eax+02],cl

too without success.

I try it to NOP on other locations and different variations too. (game.jpg)
Changing "test eax,eax" to "test edi,edi" closes the game immediately.


Maybe the game check it on other locations too?
Some idea?

game.jpg
 Description:
 Filesize:  94.64 KB
 Viewed:  7084 Time(s)

game.jpg
Kernel.jpg
 Description:
 Filesize:  55.5 KB
 Viewed:  7084 Time(s)

Kernel.jpg
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Dark Byte
Site Admin
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Joined: 09 May 2003
Posts: 25794
Location: The netherlands
PostPosted: Tue Aug 04, 2015 3:48 pm    Post subject: Reply with quote
aa script:
Code:

kernelbase.isDebuggerPresent:
xor eax,eax
ret


Also, since it's steam, you may want to check out http://forum.cheatengine.org/viewtopic.php?p=5598917 else the game will crash to desktop as soon as a breakpoint it hit


Or if you don't need a break at entrypoint just use the VEH debugger interface
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Palimpalim
Newbie cheater
Reputation: 0

Joined: 02 Jan 2012
Posts: 23
Location: Deutschland
PostPosted: Tue Aug 04, 2015 4:21 pm    Post subject: Reply with quote
Thanks for quick answer.

Dark Byte wrote:
aa script:
Code:

kernelbase.isDebuggerPresent:
xor eax,eax
ret


Not working.

I check out your link tomorrow. good n8
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