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| OllyDbg OllyInvisible Detection |
Debugging |
ap0x |
CsrGetProcessId-OllyInvisible.zip |
March 11 2006 |
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.386
.model flat, stdcall
option casemap :none ; case sensitive
include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib
.data
DbgNotFoundTitle db "Debugger status:",0h
DbgFoundTitle db "Debugger status:",0h
DbgNotFoundText db "Debugger not found!",0h
DbgFoundText db "Debugger found!",0h
nt db "ntdll.dll",0h
ntapi db "CsrGetProcessId",0h
.code
start:
; MASM32 antiOlly example
; coded by ap0x
; Reversing Labs: http://ap0x.headcoders.net
; This example can detect OllyDBG plugin OllyInvisible.
; It hooks CsrGetProcessId so it always returns FALSE.
PUSH offset nt ;ntdll.dll
CALL LoadLibrary
PUSH offset ntapi ;CsrGetProcessId
PUSH EAX
CALL GetProcAddress
CALL EAX
TEST EAX,EAX
JE @DebuggerDetected
PUSH 40h
PUSH offset DbgNotFoundTitle
PUSH offset DbgNotFoundText
PUSH 0
CALL MessageBox
JMP @exit
@DebuggerDetected:
PUSH 30h
PUSH offset DbgFoundTitle
PUSH offset DbgFoundText
PUSH 0
CALL MessageBox
@exit:
PUSH 0
CALL ExitProcess
end start
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