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EventPairHandles Anti-Debugging
An EventPair Object is an event constructed by two _KEVENT structures which are conventionally named High and Low.
There is a relation between generic Event Objects and Debuggers because they must create a custom event called DebugEvent able to handle exceptions. Due to the presence of events owned by the Debugger, every information relative to the events of a normal …
CloseHandle, NtClose Anti-Debugging
When a process is debugged, calling NtClose or CloseHandle with an invalid handle will generate a STATUS_INVALID_HANDLE exception.
The exception can be cached by an exception handler. If the control is passed to the exception handler, it indicates that a debugger is present.