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This plugin identifies ETW patching by inspecting the first opcode of the following functions:
If the initial opcode is 0xC3 (RET) or 0xE9 (JMP), the function is flagged as patched.
Below is a screenshot demonstrating when the detection is triggered:

Also, I've added support for scanning specific processes.
This method only checks the first opcode. If an attacker patches elsewhere in the function in a way that corrupts it - the modification will not be detected.
Note: This is my first plugin - any feedback is welcome!