Q. Why is calling IsDebuggerPresent not very effective against reversers?

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Q. How can IsDebuggerPresent be implemented intrinsically?

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Q. What is the disadvantage of implementing IsDebuggerPresent intrinsically?

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Q. How likely are the internal offsets in the NT data structure to change?

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Q. What is required to incorporate assembly language code into a program?

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Q. What is the SystemKernelDebuggerInformation request code used for?

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Q. What is the data structure returned by the SystemKernelDebuggerInformation request?

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Q. What should be checked to determine whether a kernel debugger is attached to the system using SystemKernelDebuggerInformation?

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Q. What is the potential risk of detecting the presence of a kernel debugger?

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Q. What is the Single-Step Interrupt used for in NuMega SoftICE?

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Q. How does the program use the exception handler to detect whether SoftICE is running?

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Q. What is the advantage of using the Single-Step Interrupt trick to detect SoftICE?

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Q. What is the trap flag approach for detecting debuggers?

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Q. What is the advantage of the trap flag approach?

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Q. What is a limitation of the trap flag approach?

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Q. What is the advantage of using code checksums as an antidebugging technique?

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Q. How does the code checksum technique work as an antidebugging measure?

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Q. What is the downside of using code checksums as an antidebugging technique?

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Q. How can the use of code checksums be optimized to minimize the impact on program execution time?

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Q. What is a potential consequence of modifying the program code to make it more difficult for reversers to understand the program flow?

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