reg add "HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509-50c905bae2a2\InProcServer32" /ve /t REG_SZ /d "C:\Path\To\Your.dll" /f
Registry-only persistence (no new file in startup folder) often evades simple antivirus scans. By the time you see the reg add command in logs, the malware may already be active.
: A subkey that registers a 32-bit in-process server.
: HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509-50c905bae2a2\InprocServer32