Question malware detected other software

[carlos88]

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?

[AlexeyK]

6 часов назад, carlos88 сказал:

QtWebKit4.dll (Trojan:Win32/Wacatac.C!ml)

You've created too many threads on forums, don't you think? One, two, three, four, and plus one here. 🙂

Is this your file? If yes - upload this file via the link, wait for the analysis to be completed, and attach the link to the TIP's analysis here.

[carlos88]

https://www.virustotal.com/gui/file/935cd9070679168cfcea6aea40d68294ae5f44c551cee971e69dc32f0d7ce14b?nocache=1

 

https://hybrid-analysis.com/sample/935cd9070679168cfcea6aea40d68294ae5f44c551cee971e69dc32f0d7ce14b

[AlexeyK]

@carlos88 As I see, you didn't upload the file into TIP (no dynamic analysis and button "submit to reanalyze"). But now it is being detected by Kaspersky. Any other questions?

[carlos88]

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?

 

QtWebKit4.dll Trojan:Win32/Wacatac.C!ml in Microsoft Defender

Edited 3 hours ago by carlos88

[harlan4096]

https://threats.kaspersky.com/en/threat/Trojan.Win32.Agent/?orig=Trojan.Win32.Agent.xcajyl&utm_content=ti&utm_campaign=ti&utm_source=opentip&utm_medium=referral&icid=ti

[AlexeyK]

1 минуту назад, carlos88 сказал:

Why did it detect this now?

Because KSN works, it analyzes new files and adds detections. But it's impossible to say for sure, maybe someone sent a sample to virlab.

By the way, someone just uploaded a file to TIP, and now there is a dynamic analysis.

[carlos88]

this is type of malware QtWebKit4.dll (Trojan:Win32/Wacatac.C!ml) Trojan.Win32.Agent.xcajyl the kind that modifies, deletes, or corrupts files on the PC?

[AlexeyK]

13 минут назад, carlos88 сказал:

this is type of malware 

You have been given a link to the Kaspersky verdict description, we don't have any other links. There are no malware analysts here, and we don't know what exactly this malware is doing. You are copying the Microsoft Defender verdict - it's some kind of general machine-learning detection.

[carlos88]

what good forum communitys malware analysts?

[harlan4096]

This is not a forum for malware analysis, but a Support forum. I would just change password of online services, also enable 2FA authentication in online services.

 

Also, there is a file with same name, that is legit:

 

https://systemexplorer.net/file-database/file/qtwebkit4-dll/1374096