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I need to writte a program entrypoint onwards when its loaded from disk to memory. In order to do that i use PsSetLoadImageNotifyRoutine to check when image is loaded. When i get that the .exe file is beeing loaded i get its addres entry point (base addres of the image that i get from Imager_INFO + reading the header to get the offset entry point).
The problem comes when i try to writte the memory as i get a STATUS_ACCESS_VIOLATION which i supoused that is happening due to the fact that the memory does not have write permission (correctme if wrong and is due to another thing). Then what i would like to do is to use MmProtectMdlSystemAddress to change permissions, writte it and restore permissions. In order to do that i use IoAllocateMdl+ MmProbeAndLockPages+... But it gets stuck on ProbeAndLock due to the fact that system handles a lock to it (Doc: To avoid deadlocks, load-image notify routines must not call system routines that map, allocate, query, free, or perform other operations on user-space virtual memory.).
In order to solve this i read this option https://stackoverflow.com/questions/50610741/windows-kernel-driver-zwallocatevirtualmemory-causing-thread-to-terminate but the instruction KeInitializeApc to insert the APC is not documented. What should i do? Should i use KeInitializeApc or is there another aproach to modify the memory without using it?
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