NOMS stands for Network Object Malware Scanner.
It is product of CBTS and is provided as part of a corporate security system. So the programme is installed on your PC by your corporate IT department.
It is intended to protect the company from dodgy downloads or websites. Which is a different target to the likes of McAfee, which you mention in your question.
The executable was updated a couple of days ago and seems now to use less CPU time, although it still runs at a pretty constant 10%.
The exe is obviously kept protected to stop people like you and I stopping it from running.
