OllyDBG v2.xx plugin - OllyExt

[s0me0n3]

Originally Posted by sendersu

@author
have you seen this interesting piece of code?
http://pastebin.com/6kbt1Vka

did you already have it inside the Ext the tool?

Originally Posted by memcpy

This pastebin is irrelevant, it's for Kernel debugger detection. Olly is usermode debugger. You don't have to add this mate.

I have to disagree from what I can see on the pastebin stuff:

//On the other hand, if KdPitchDebugger is set to false, a check for the "SeDebugPrivilege"
//privilege is conducted, a sign of presence of Kernel and/or UserMode debugger(s).

and

else
{
printf("Kernel Debugger present\r\n");
if(retValue != 0xC0000022) printf("UserMode Debugger present as well\r\n");
}
}

Tell me where I am wrong.

[ferrit.rce]

I've a test code for this and it's relevant only in some rare circumstances. The user mode debugger can be detected only if a kernel mode debugger is installed, running and the program debugged under the user mode debugger. I've never seen this protection in any protector but I can implement it in no time This will be done in the next release...

Originally Posted by s0me0n3

I have to disagree from what I can see on the pastebin stuff:



and



Tell me where I am wrong.

[qkumba]

Originally Posted by ferrit.rce

I've a test code for this and it's relevant only in some rare circumstances. The user mode debugger can be detected only if a kernel mode debugger is installed, running and the program debugged under the user mode debugger. I've never seen this protection in any protector but I can implement it in no time This will be done in the next release...

That's not even quite true. It's not detecting any user-mode debugger. It's detecting that a kernel debugger is running and that the process has the SeDebugPrivilege, which is completely independent of any user-mode debugger.

It's not a reliable detection method.