This won’t get too long. Just a quick fix for heavens gate hook (https://mark.rxmsolutions.com/through-the-heavens-gate/) as Microsoft updates the wow64cpu.dll that manages the translation from 32bit to 64bit syscalls of WoW64 applications.

To better visualize the change, here is the comparison of before and after.

With that being said, you cannot place a hook on 0x3010 as it would take a size of 8 bytes replacement. And would destroy the call mechanism even if you fix the displacement of call.

The solution

The solution is pretty simple. As in very very simple. Copy all the bytes from 0x3010 down until 0x302D. Fix the displacement only for the copied jmp at 0x3028. Then place the hook at 0x3010.
Basically, the copied gate (via VirtualAlloc or Codecave) will continue execution from original 0x3010. And so, the original 0x3015 and onwards will not be executed ever again.

Pretty easy right?

Notes

In the past, Microsoft tends to use far jump to set the CS:33. CS:33 signify that the execution will be a long 64 bit mode in order to translate from 32bit to 64bit. Now, they managed to create bridge without the need for far jmp. Lot of readings need to be cited in order to understand these new mechanism but please do let me know!