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OpenRCE Anti Reverse Engineering Technique >> OutputDebugString on Win2K and WinXP

Technique Name Category Analysis By Download Added On Last Updated
OutputDebugString on Win2K and WinXP Debugging RussellOsterlund December 11 2007
Description:
On Windows XP and Windows 2000, OutputDebugString is sensitive to the presence of an attached debugger.  For example:

DWORD AnythingButTwo = 666;
SetLastError( AnythingButTwo );
OutputDebugString( "foobar" );
if( GetLastError() == AnythingButTwo )
{
// debugger is attached
}
else
{
// debugger is not attached
}

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