Malware found after scan

[gamerfan]

I ran a full scan with Microsoft Defender on my PC and it found the file AppData\Roaming\secure\QtWebKit4.dll (Trojan:Win32/Wacatac.C!ml).

But before using Defender, I had run a full scan with Malwarebytes Free and Kaspersky Free and found nothing. Why did it detect this now?

Is this type of malware the kind that modifies, deletes, or corrupts files on the PC?

 

[lxskllr]

Might be a false positive. You'll have to research further. Figure out when and where it came from. A quick search says it's a legit file, or can be. Doesn't mean legit files can't be compromised or spoofed.

 

[gamerfan]

tested file

VirusTotal

VirusTotal

www.virustotal.com

 

[Steltek]

It was likely a heuristic detection that resulted in a false positive.

Happens a couple of times a year for me with subscription Malwarebytes, but I've never yet had one turn out to be an actual malware infection.