Before we delve into the intricacies of individual methods of anti-debugging let's use this post to define the classes of anti-debugging that we will be discussing. While other classes may exist, the definition of these classes is an attempt to include the majority of anti-debugging methods i...
In this first part of the iOS anti-debugging series I will describe one of the most commonly used anti-debugging techniques in iOS nowadays and provide ways to bypass it. Using ptrace with PT_DENY_ATTACH Ptrace is a system call that is primarily used to trace and debug applications. The ...
How to bypass the NtGlobalFlag checkTo bypass the NtGlobalFlag check, just performing reverse the actions that we took before the check; in other words, set the the NtGlobalFlag field of the PEB structure of the debugged process to 0 before this value is checked by the anti debugging ...
Then, try to bypass some and have fun.How to add a new anti debugging methodCreate a new file .h on the Methods folder with the name of the method. Implement your anti debugging function on the new file. This function will run on the main loop if enabled. It has to return a bool...
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Misalignment is induced by including a bypass which leads, during execution, to a legitimate location. During analysis, however, bogus data may be analyzed by the disassembler due to the bypass. Run-time modifications may also be included in code. Code is changed to an invalid state, and ...
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[2] Anti-debugging and anti-tracing techniques - Exploiting memory discrepancies (1) kernel32!IsDebuggerPresent IsDebuggerPresent returns 1 if the process is being debugged, 0 otherwise. This API simply reads the PEB!BeingDebugged byte-flag (located at offset 2 in the PEB structure). ...
Figure 17. How to bypass the anti-debug code Next, we dynamically debug it, bypass the anti-debug, and then dump the decrypted secondary dex file. The dynamic debugging is shown below. Figure 18. Modifying the value of R0 to non-ze...
When launching the game I get a “Failed to initialize BattlEye Service: Kernel Debugging enabled.” error. Please disable Kernel Debugging by following the instructions posted here:https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/bcdedit–debug. Afterwards you need to reboot your...