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?
It’s already been removed. My concern is whether this malware AppData\Roaming\secure\QtWebKit4.dll (Trojan:Win32/Wacatac.C!ml) detected by Microsoft Defender corrupted, deleted, or modified my personal files, especially the compressed ones. Before testing with Defender, I used Kaspersky Free as my main antivirus, but I also scanned with Malwarebytes Free and Adwcleaner, and according to all of them, the system was clean and without anything. I downloaded a lot of games, ISOs, emulators, and programs, totaling 250GB, and copied them to an external hard drive. Only after that did I switch from Kaspersky Free to Defender because Kaspersky Free was no longer free. In the first full scan of Microsoft Defender, this malware was found. So, after cleaning, will I have to download everything again to ensure they are intact and copy everything again to the four external hard drives? On VirusTotal, this same malware found by Defender has several different names for different antiviruses. It’s hard to tell what it actually is, but I posted the test results at the beginning of the thread, along with a screenshot of the folder where it’s located.
Because they said Kaspersky was one of the best antiviruses, I thought this also applied to the free version, but I think it’s only the paid version. I used the free version for years, and from what I see in the file folder, it’s been on my PC since 2024.