Aggressive malware warning won't go away

Suddenly this window pops up while I was working. I clicked on "show in finder" and it doesn't show anything in finder, closes and immediately a new pop up window with the same message. How do I stop this and where do I find the malware? The computer is a 16inch MacBook Pro 2019. 2.3 GHz 8-Core Intel Core i9 running OS Big Sur Version 11.7.10

It is set to update operating system automatically, so I assume it is as updated as it can be.