"X will damage your computer" warning keeps popping up

I keep getting a malware warning on my Mac saying '“Cucullate” will damage your computer. You should move it to the Bin.' I keep pressing 'Move to Bin' when the warning comes up, but the warning keeps popping up every ten seconds. When I check the bin, there's nothing there. I'm not aware of any application/file called Cucullate and can't find it when I search on the computer. I've also scanned using Malwarebytes and it hasn't picked up anything. No idea where the issue is coming from or how to stop the warnings - as they keep coming up so often they're really hampering my work now, so any help would be much appreciated!