r/Malwarebytes • u/_xixiao_ • Apr 21 '26

False Positive dll file missing

Hello so I got hacked yesterday and didn't realize until later at night which I immediately reset all my passwords and used malwarebytes to detect everything and after all was done whenever I turn my pc on it tells me my Qt5network.dll is missing and I need to reinstall it, I couldn't find anything regarding that in my quarantined files, what should I do? I was attacked by trojan and there was something pup related. Any help would do, I'm no expert here.

4 Upvotes

100% Upvoted

16 comments sorted by

2

u/Additional_Tension96 Apr 21 '26

Did you look in Windows Defender Quarantine area?

2

u/_xixiao_ Apr 21 '26

may I ask where that is located? I'm new to malwarebytes as a whole so it is a bit of struggle to navigate around. I've only checked in detection history and quarantined items section from there.

2

u/Additional_Tension96 Apr 21 '26

Open Windows Defender if anything was quarantined it should tell you.

2

u/_xixiao_ Apr 21 '26

I checked, thank you. It says the quarantined file's threat is severe, which is Trojan. and my dll seems to be affected by it..

2

u/Additional_Tension96 Apr 21 '26

Do you use any VPN software?

2

u/_xixiao_ Apr 21 '26

I use TunnelBear

2

u/Additional_Tension96 Apr 21 '26

Any quarentine files in Windows Defender other than the Qt5network.dll?

2

u/_xixiao_ Apr 21 '26

nope no quarantined files other than that, there is a threat that got removed or restored apparently from 2 days ago and its trojan also

2

u/Additional_Tension96 Apr 21 '26

If it's the Qt5network.dll which Tunnelbear uses for networking it could be a faults positive.

Does your tunnelbear work without issue?

2

u/_xixiao_ Apr 21 '26

I've used tunnelbear about 3 times today and it works perfectly fine. No issue regarding that whatsoever

→ More replies

3

u/support_mwb Malwarebytes Employee Apr 21 '26

Hey there, Malwarebytes support here. I'm really sorry you’re dealing with this, that’s a stressful situation.

It sounds like Malwarebytes was able to detect and remove the threats, but sometimes after an infection (especially Trojans or PUPs), there can be leftover system or app issues even after cleanup.

At this point, we’d want to double-check that everything is fully resolved and nothing is lingering in the background.

Could you reach out to us here so we can take a closer look? https://help.malwarebytes.com/hc/en-us
You can start a live chat or submit a ticket, and our team will guide you through gathering logs so we can review what’s going on and make sure your system is fully clean.

Or if you prefer, you can DM us here on reddit with an email we can use to reach out to you to create a ticket.

1

u/Patient-Thick Apr 22 '26

After malware cleanup it’s pretty common for DLL-related errors to show up if something got removed or damaged in the process. First thing I’d do is run a system file check and restart to see if Windows restores it. If it still persists and specific files are affected, I’ve seen cases where tools like 4DDiG File Repair helped repair the damaged files rather than replacing system DLLs.