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Which is the first anti debugging API in Windows?
NtSetInformationThread (ZwSetInformationThread) – the first anti-debugging API implemented by Windows. Class HideThreadFromDebugger, when passed as an argument, can be used to prevent debuggers from receiving events (include breakpoints and exiting the program) from any thread that has this API called on it.
Which is the best protection against debugging so far?
The best protection against debugging so far seems to be own virtual machine. Effectively, part of object code is converted to self bytecode format, which is run on a self-written VM. The only way to properly debug such code will be emulator/disassembler for custom VM instruction format.
Where is the trap flag in anti debug?
There is a Trap Flag in the Flags register. When the Trap Flag is set, the exception SINGLE_STEP is raised. However, if we traced the code, the Trap Flag will be cleared by a debugger so we won’t see the exception.
Which is the best anti-debugging cheat sheet?
CheckRemoteDebuggerPresent – same functionality as previous – simple bool function, straight use FindWindow – used to detect specific debuggers – for instance, OllyDbg window class is named “OLLYDBG” 🙂 Other popular debuggers classes checks include “WinDbgFrameClass”, “ID”, “Zeta Debugger”, “Rock Debugger” and “ObsidianGUI”
How can a Malware Detect the presence of a debugger?
In order to detect the presence of a debugger, malware can either read some values or it can use API present to detect if the malware is being debugged or not. One of the simple debugger detection tricks includes using the winAPI function known as KERNEL32.IsDebuggerPresent.
Why are debuggers used to analyze mobile applications?
Debuggers are a relatively common tool for analyzing a mobile application for legitimate reasons. But debuggers can be used for evil purposes too. Like other reversing techniques, debuggers give an attacker greater visibility into the internals of your application.