Windows 10: What is trojan.siredef.c

I just ran my monthly scan using Malwarebytes Free. It found 2 instances in Recycle bin. I have quarantined them.

How did it get past Defender?

What should I do next? Am I clean?

:)

 

Apps not closing, still running in background

Thanks for the response. I am not looking for a "close all" function. Sometimes I intentionally want to leave an app running. In windows phone 8.1, I could exit and close th app by merely selecting the arrow/back button, I am looking for that same functionality.
When I'm in an app, I want to be able to exit directly from there and not have it continuing in the background.

 

Apps not closing, still running in background

I just got my Lumia 950 phone. On my prior Windows phone, when I pressed the arrow/back button on the bottom left screen, I would exit the app. On Windows 10 phone, I've been doing that and I just realized I'm not exiting the apps. I had intentionally not
exited an app (because it had my boarding pass). Instead of back button, I pressed the middle window button. Later when I went back to call up my airline app, I pressed the arrow/back button and held it. Similar to my old windows phone, it showed me all the
apps that were open. SURPRISE! unlike my previous phone, no app had been closing. Right now, I can't seem to find a "one click" way to exit an app. The only way is after I've done a few things, I hold the back button and click the "X" on each of the open items.

Can someone tell me how to exit an app with one click or swipe so that it is not still running, i.e. when I press the back button I will not see it? I'm sure this is something simple. I search the instructions that came with the phone and looked in the
forum but haven't found the answer.

thanks in advance the assist.

 

Can you upload the log that Malwarebytes created about the found Trojan?

Microsoft Defender is an antivirus, whereas Malwarebytes is an anti-malware; two different products and beasts. Malwarebytes is a recommendation for most, because its goal is to stop treats as they are developed and released. Whereas Defender will take a little while to get a database update of new malware.

To check the entire system, use a tool like ESET's Online Scanner to check for any malware present on the computer: Free Virus Scan | Online Virus Scan from ESET ESET

If ESET is finding actual malware, we'll need a specialized malware tech to disinfect the system.

 

Trojan:Win32/Sirefef.C threat description - Windows Defender Security Intelligence

 

I ran ESET - All clear.

Next Step? Am I clean?
@simrick - would really like some help here please?

 

Hi.
If you would, please download and run ADWCleaner, just to make sure.
Downloads - AdwCleaner - ToolsLib

If it finds anything, please upload the logs.

I would really like to see the log file from MBAM - can you copy and paste here? Need to see what/where it found this trojan.

It's possible that all the browsers on the system may need to be reset - even the ones that you don't use (Internet Explorer).

 

Heres Adwcleaner; I removed the PUP it found.

# AdwCleaner 7.0.4.0 - Logfile created on Thu Nov 16 05:35:04 2017# Updated on 2017/27/10 by Malwarebytes # Database: 11-15-2017.1# Running on Windows 10 Home (X64)# Mode: scan# Support: https://www.malwarebytes.com/support*****
[ Services ] *****No malicious services found.*****
[ Folders ] *****PUP.Optional.Legacy, C:\Users\Geoff\AppData\Local\AdvinstAnalytics*****
[ Files ] *****No malicious files found.*****
[ DLL ] *****No malicious DLLs found.*****
[ WMI ] *****No malicious WMI found.*****
[ Shortcuts ] *****No malicious shortcuts found.*****
[ Tasks ] *****No malicious tasks found.*****
[ Registry ] *****No malicious registry entries found.*****
[ Firefox (and derivatives) ] *****No malicious Firefox entries.*****
[ Chromium (and derivatives) ] *****No malicious Chromium entries.*************************
C:/AdwCleaner/AdwCleaner[S0].txt - [1144 B] - [2017/5/20 7:44:8]
C:/AdwCleaner/AdwCleaner[S1].txt - [1240 B] - [2017/6/12 6:30:44]
C:/AdwCleaner/AdwCleaner[S2].txt - [1078 B] - [2017/10/6 7:47:57]
C:/AdwCleaner/AdwCleaner[S3].txt - [1145 B] - [2017/10/8 5:57:23]

Malwarebytes; This weird. The log says it found nothing and it ran for 20mins? Well it actually found 2 x Trojans & ran for a few hours because I always run a custom scan.

Malwarebytes Anti-Malwarewww.malwarebytes.org
Scan Date: 15-Nov-17Scan Time: 2:01
PMLogfile:
Scan Log.txtAdministrator:
YesVersion: 2.2.1.1043
Malware Database: v2017.11.15.01
Rootkit Database: v2017.10.14.01
License: FreeMalware
Protection: DisabledMalicious
Website Protection: DisabledSelf-protection:
DisabledOS: Windows 10CPU: x64File
System: NTFSUser: GeoffScan
Type: Threat
ScanResult: CompletedObjects Scanned: 315163Time Elapsed: 20 min, 14 secMemory: EnabledStartup: EnabledFilesystem: EnabledArchives: EnabledRootkits: EnabledHeuristics: EnabledPUP: EnabledPUM: EnabledProcesses: 0(No malicious items detected)
Modules: 0(No malicious items detected)
Registry Keys: 0(No malicious items detected)
Registry Values: 0(No malicious items detected)
Registry Data: 0(No malicious items detected)
Folders: 0(No malicious items detected)
Files: 0(No malicious items detected)

 

Windows defender is supposed to provide protection for this trojan: trojan.siredef.c
Each AV product has false positives, false negatives, true positives, and true negatives.
So another product checking is useful.
Expand the sections in this link.
There is an additional Microsoft scanner.
Trojan:Win32/Sirefef.C threat description - Windows Defender Security Intelligence
Prevent virus or malware infection - Windows Defender Security Intelligence

 

@simrick I've just done a Malwarebytes Threat scan. All ok.

Also performed SFC/ Scannow - all ok.

 

Sounds good! *Thumbs Go ahead and mark the thread as solved.