What is the main approach described in Part 4 for deleting a single EVTX log record from the current system?

Part 4 introduces a technique where the attacker injects a DLL into the Eventlog service process (svchost.exe) to obtain and use the exclusive handle to a specific EVTX log file. Once inside the process, the injected code can modify the log file directly, bypassing the exclusive lock that normally prevents external processes from writing to it. This approach is detailed in Windows XML Event Log (EVTX) Single Log Entry Deletion (Part 4) – Deleting a Single Log Record from the Current System by Obtaining Log File Handle via Injection.