Good Day Bhim
My name is Carlo, I'm an Independent Advisor and community member like you.
I am also using Windows 10 pc.
The genuine MSASCuiL.exe file is a software component of Microsoft Windows 10 by Microsoft. It is the Windows Defender or Security.
No worries, rest assured that it is not harmful to your device. I have that service as well in my computer.
Have a wonderful day ahead and stay safe.
Sincerely,
Carlo T.