Random, really strange names on those two processes!
I have seen similar before, and are probably part of bitcoin mining software (probably installed with something else that you downloaded recently)
Before you quit those processes through your Activity Monitor, choose the info window, then "Open Files and Ports" should give you a location for the files so you can delete them from your system. This is also a good time to run a scan of your system using a useful malware tool such as Malwarebytes for Mac
- free to download and use. (After 30 days, Malwarebytes reverts to a free version if you choose to not purchase it)