Defender keeps finding the same "Trojan downloader"

f14tomcat · 20 Sep 2018

Get the latest Defender Updates first, if any. Offline Defender scan does not check for updates.

Supra · 21 Sep 2018

I've done an offline scan a couple times. Just now I logged in, Malwarebytes scanned and found nothing whereas Defender found the same threat in the same folder a few minutes afterwards, however the filename is different.

VirusTotal Results

Helmut · 21 Sep 2018

That looks like a DOC attachment to an Email in the Windows 10 Mail App.
MS Office Word DOC attachments can potentially contain a Macro virus.

Only you will know whether you send or receive mails with Word Docs with macros.

I assume that you use the Mail App. If you don't then uninstall the Mail App.
You can reinstall via the MS Store.

das10 · 22 Sep 2018

As above;
the location
microsoft.windowscommunicationsapps_8wekyb3d8bbwe\
suggests the file is being downloaded by one of the Windows Communications or Store Apps.

When you check for mail, at least make sure there are no remnants of old emails left in your Junk/Spam/Deleted Folders.

If you are using the Windows Mail or Calendar App try disabling "Automatically Download External Content" to see if it makes any difference:

Turn On or Off Download External Content in Windows 10 Mail app | Windows 10 Tutorials

Supra · 22 Sep 2018

I'm going to try disabling external content just for the sake of testing, but it means a lot of my emails are indecipherable because they consist of images.

These days I do get a decent amount of phishing emails, I never used to, I'd guess it's someone else in the household signing up to funky shit and it's spread across the network. However, if Mail is to blame for automatically downloading email attachments then that's asinine.

das10 · 22 Sep 2018

Also worth noting is that Malwarebytes offer Free Expert advice in their Malware Removal Forum.

Windows Malware Removal Help Support - Malwarebytes Forums

z3r010 · 22 Sep 2018

Bleepingcomputer.com is a far better place to go than Malwarebytes for dedicated malware help.

Supra · 25 Sep 2018

I still seem to be getting trojan downloaders. :\ If there's no other advice available here I guess I'll head over to the aforementioned sites for help.

Defender keeps finding the same "Trojan downloader"-capture.png

das10 · 25 Sep 2018

Sorry couldn't offer you any solution, it would be best to try Bleepingcomputer.com as linked above who may be able to offer a more through and comprehensive solution to your problem.

In the mean time give AdwCleaner a go as well:
Malwarebytes Acquires AdwCleaner - Windows 10 Forums

Kind regards.