regsvcs.exe /U regsvcs.dll 

regsvcs.exe regsvcs.dll

https://pentestlab.blog/2017/05/19/applocker-bypass-regasm-and-regsvcs/
https://github.com/redcanaryco/atomic-red-team/blob/master/Windows/Payloads/RegSvcsRegAsmBypass.cs
https://github.com/redcanaryco/atomic-red-team/blob/master/Windows/Execution/RegsvcsRegasm.md
https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/