Weird (and likely false) Malware

[Alan G]

I've really never come across something like this before.  

 

I’ve been using Edge as my browser for the past several months as Firefox was lagging and using up too much CPU.  Earlier this week I saw CPU usage spike to 100% in a random fashion.  I had just done the May updates and don’t know if that was an issue as I never saw this before.  I was prompted to do a full system scan with Microsoft AV (I have three hard drives in addition to an NVME OS drive).  Defender has never picked up a virus during the regular quick scans.

 

The full scan came up positive for Trojan Win 32 Vigorf.A which is labeled severe.  I let Defender quarantine it and tried to figure out how this happened.  I’m a very cautious user and never visit dodgy websites or open attachments that I know nothing about.  The virus was in an Adobe Dreamweaver CS4 install file on my data hard drive.  I have not used Dreamweaver in a number of years and it was not installed on my current OS drive.  It’s likely that this just might have been a false positive.  As far as I can tell, this install file predated the appearance of the virus.  I think it just was a false positive and I deleted the install file.

 

After restarting my computer, Edge seems to be behaving normally.