Charlie7000

Thanks. Kaspersky didn’t find anything after reinstalling windows 10. I’ll see if all goes ok with it tonight.

Thank you Ron. Doing that now. As the worm lives in the memory apparently and launched from there - do I need to change my ram stick? Or is it not possible for it to stay in the memory once the drive is erased? Thanks,

What I find amazing is that the usb stick got infected by an apparently dead drive on a pc I was fixing. It was a netbook with 2 drives - the main boot drive didn’t show in bios or in parted magic. I was installing Linux on the second, working drive via usb stick. Gave up trying to install because keyboard and mouse weren’t working. Because keyboard worked at bios level I suspected a virus on the hidden/dead boot drive. And stupidly decided to test to see if the usb stick had picked up a virus by sticking into an unused laptop with no files on (had Norton on though). I had assumed that as the usb only contained a Linux iso it would not get viruses. Not doing that again!

A question - this virus gets into ram - will wiping the drive be enough? Or will it come back via the ram please?

Malwarebytes showed my main pc to be clear as did Norton.

Thanks very much for responding Ron. Shortly after that, Norton found W32.Sillyfdc and removed it requiring a restart. Bit of a panic after googling what that was so shut down the WiFi, burned a new usb with parted magic (on my main laptop). And wiped the drive and met of the infected pc - then binned the usb stick. Hope you can follow this - I have quite a few computers. However - at the same time Norton found W32.Sillyfdc, I had another laptop turned on nearby and my iPhone nearby made a beep for no reason. That was when I turned off the WiFi and have been trying to methodically go through what needs to be done to prevent W32.Sillyfdc spreading via the network. Have now wiped that second laptop and reset my iPhone to factory settings. What next please? Would like to upgrade the router firmware but that means turning WiFi back on. Other devices that have been using the WiFi are - 2 other iPhones and a Nintendo Switch plus a couple of Linux laptops. I realise those gadgets can’t get windows viruses but think they could contain them via the network and pass them on when plugged into a pc via usb? Eg to do iPhone backups etc. So advice on what to do next re the network and other devices would be appreciated. Meanwhile have installed Panda vaccine on my main pc and vaccinated all other usb sticks.

Just to be clear, it was Norton Security that blocked Heur.AdvML.C. Now two things happened just before that popped up. Firstly I installed Malwarebytes and unsubscribed to the premium trial so it was for scan only. I did that because I was about to insert a usb drive that had been in a laptop I had just bought - just in case the usb had got a virus from the laptop (belt and braces). The laptop I used to do all this is a spare one I don't use, with nothing on it except a recent clean install of Windows 10. First thing I thought was Norton thinks something in Malwarebytes is some kind of threat. However it keeps coming up. I am now wondering if the usb was infected and something is on the laptop. On first putting the usb in the laptop I scanned it with Malwarebytes - nothing showed. I then scanned it with Norton. Nothing there. Only after those scans of the usb did the pop up come from Norton with the message about Heur.AdvML.C. which it has classed as medium risk. First instinct was it was a false positive since Malwarebytes had just been installed. However the laptop I had used the usb in may well have viruses - I used the usb to wipe the drive clean but there is another drive on it (soldered to the mother board) that was the original boot drive and isn't showing in bios - I assumed it had died. Also keyboard and mouse don't work on that laptop after bios (but work when in bios). Anyway have just about decided to give up on fixing that one. Main issue is - have I infected my spare laptop via the usb or is it a false positive? Thanks.