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Process of analyzing live programs through software (e.g. ptrace) or hardware (e.g. JTAGs) devices.
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answer
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Handling INT 2D anti-debugger technique in IDA Pro
I'm analyzing a PE file using IDA Pro that is using int 2Dh technique as anti debugging:
CODE:00455050 push ebp
CODE:00455051 mov ebp, esp
CODE:00455053 push ecx
CODE:00455054 push ebx … eax
CODE:00455059 push ebp
CODE:0045505A push offset loc_455076
CODE:0045505F push dword ptr fs:[eax]
CODE:00455062 mov fs:[eax], esp
CODE:00455065 int 2Dh ; Windows NT - debugging …