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Malware that's unrecognised by anti-virus, and hard to get rid of manually


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#1 fries

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Posted 09 August 2017 - 03:52 AM

Hello everyone

 

A week or two ago, my computer became infected with a virus, that made using the computer very slow and hard. I first saw it in my task manager, which i saw was at almost 100% memory and disk usage despite having no applications running. Both avast and malware bytes came up with the machine being clean, so i tried to remove it manually by killing the process in taskmanager. After a couple of seconds it reboots and starts running again so i thought to delete the virus by going into the folder and trying to delete it there. By clicking on properties i found out it was in appdata/roaming/securityessentials/ViaFile.exe. Unfortunately windows claims i dont have access to the folder(security essentials) despite being the admin. when i tried to unhide all the folders in roaming, security essentials didnt turn up, so i tried to change ownership by going into

roaming>properties>security>advanced 

there I checked the box on the bottom to give me ownership but all of the files except for security essentials and monitor/guard went through alright. Windows came up with this error:

 

Failed to enumerate objects in container   access is denied.

 

So I decided to download process explorer and see what was going on and saw that ViaFile.EXE was using vbc.exe in framework v2.0.5027 to run a bunch of installutil.exe.

 

BY clicking on properties i got the image attached below(ViaFile.EXE properties)

 

i tried going to to task scheduler and deleting the task but it comes back every time you exit the window. Similarly i went on to HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon and deleted the corresponding SHELL REG_SZ file, but that also reappears if you refresh the window. renaming it makes another copy.

 

i thought about formatting the disk, but i read that even that doesnt have 100% chance of success, so im stuck.

Any help would be much appreciated Thank you.

 

Attached Files



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#2 fries

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Posted 09 August 2017 - 03:58 AM

"i tried going to to task scheduler and deleting the task but it comes back every time you exit the window"

 

By this i mean i tried going to the autostart location and deleting that.

 

Sorry for any confusion



#3 fries

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Posted 09 August 2017 - 04:14 AM

Here are the FRST files, i forgot to attach them beforehand

 

Attached Files



#4 nasdaq

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Posted 09 August 2017 - 09:06 AM

Hello, Welcome to BleepingComputer.
I'm nasdaq and will be helping you.

If you can please print this topic it will make it easier for you to follow the instructions and complete all of the necessary steps in the order listed.
===

Press the Windows key + r on your keyboard at the same time. This will open the RUN BOX.
Type Notepad and and click the OK key.

Please copy the entire contents of the code box below to a new file.


Start

CreateRestorePoint:
EmptyTemp:
CloseProcesses:

HKLM Group Policy restriction on software: %systemroot%\system32\mrt.exe <==== ATTENTION
HKU\S-1-5-21-3345936263-2411407459-767642959-1001\...\Winlogon: [Shell] EXPLORER.EXE,"C:\USERS\SAGAR\APPDATA\ROAMING\SECURITYESSENTIALS\VIAFILE.EXE" <==== ATTENTION
BHO: No Name -> {602ADB0E-4AFF-4217-8AA1-95DAC4DFA408} -> No File
BHO-x32: No Name -> {602ADB0E-4AFF-4217-8AA1-95DAC4DFA408} -> No File
CHR Extension: (Avast SafePrice) - C:\Users\Sagar\AppData\Local\Google\Chrome\User Data\Default\Extensions\eofcbnmajmjmplflapaojjnihcjkigck [2017-08-09]
CHR Extension: (Avast Online Security) - C:\Users\Sagar\AppData\Local\Google\Chrome\User Data\Default\Extensions\gomekmidlodglbbmalcneegieacbdmki [2017-06-09]
CHR Extension: (Chrome Web Store Payments) - C:\Users\Sagar\AppData\Local\Google\Chrome\User Data\Default\Extensions\nmmhkkegccagdldgiimedpiccmgmieda [2017-03-09]
CHR Extension: (Chrome Media Router) - C:\Users\Sagar\AppData\Local\Google\Chrome\User Data\Default\Extensions\pkedcjkdefgpdelpbcmbmeomcjbeemfm [2017-08-09]
CHR HKLM-x32\...\Chrome\Extension: [eofcbnmajmjmplflapaojjnihcjkigck] - hxxps://clients2.google.com/service/update2/crx
CHR HKLM-x32\...\Chrome\Extension: [gomekmidlodglbbmalcneegieacbdmki] - hxxps://clients2.google.com/service/update2/crx
S2 RunSwUSB; C:\Windows\runSW.exe [X]
ShellIconOverlayIdentifiers: [GDriveSharedOverlay] -> {81539FE6-33C7-4CE7-90C7-1C7B8F2F2D43} =>  -> No File
Task: {050A9918-B51A-407E-AB3B-92FD9AD03D8B} - System32\Tasks\secessentialupd => C:\Users\Sagar\AppData\Roaming\SecurityEssentials\ViaFile.exe [] ()
Task: {17002288-73CB-46B3-8082-B5792DC65934} - \WPD\SqmUpload_S-1-5-21-3345936263-2411407459-767642959-1006 -> No File <==== ATTENTION
Task: {2F096314-BE59-4F88-96E3-D6001A3D1D88} - \WPD\SqmUpload_S-1-5-21-3345936263-2411407459-767642959-1001 -> No File <==== ATTENTION
Task: {F1EDA7BA-815A-4BE4-A6DA-4704B29EF8C9} - System32\Tasks\secessentialupdcihuppmo.u1t => C:\Users\Sagar\AppData\Roaming\SecurityEssentials\ViaFile.exe [] ()
Task: {FCB95867-1120-4D5B-8C27-377CCAE120A7} - \WPD\SqmUpload_S-1-5-21-3345936263-2411407459-767642959-1005 -> No File <==== ATTENTION
C:\Users\Sagar\AppData\Roaming\SecurityEssentials

End
Save the file as fixlist.txt in the same folder where the Farbar tool is running from.
The location is listed in the 3rd line of the Farbar log you have submitted.

Run FRST and click Fix only once and wait.

The tool will create a log (Fixlog.txt) please post it to your reply.
===

Reset Chrome...
Open Google Chrome, click on menu icon google-chrome-setting-icon.png or the 3 vertical dots located right side top of the google chrome.
 
Click "Settings" then "Show advanced settings" at the bottom of the screen.
 
Click "Reset browser settings" button.
 
Restart Chrome.
===

Your version of Java is outdated and needs to be updated to take advantage of fixes that have eliminated security vulnerabilities.

You can manually check your present version and update as recommended.
https://www.java.com/en/download/installed.jsp

Be careful not to install malware posing as Java update!
Important read this blog.
http://blog.trendmicro.com/trendlabs-security-intelligence/malware-poses-as-an-update-for-java-0-day-fix/

Quoted from the page.
"In light of the recent events surrounding Java, users must seriously consider their use of Java. Do they really need it? If yes, make sure that users follow the steps we recommended and get the security update directly from the official oracle website." at:
http://www.oracle.com/technetwork/java/javase/downloads/index.html

How to disable Java in your browsers
http://www.infoworld.com/t/web-browsers/how-disable-java-in-your-browsers-210882

If still present after the update you can remove the old versions of Java via the Control Panel > Programs > Programs and Features.
Java 8 Update 121 (HKLM-x32\...\{26A24AE4-039D-4CA4-87B4-2F32180121F0}) (Version: 8.0.1210.13 - Oracle Corporation)

Please let me know what problem persists with this computer.

#5 fries

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Posted 10 August 2017 - 03:20 AM

Hi Nasdaq,

It may just be a bit hasty, but i cant see any sign of ViaFile.EXE in my taskmanager and both my memory and disk are down to acceptable levels. I reset the browser, uninstalled Java as i had no use for it, and ran FRST as you suggested and the malware seems to be gone.

just out of curiosity if the problem arises again, is that fixlist.txt unique for this virus?

 

Thank you very much!

Attached Files



#6 nasdaq

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Posted 10 August 2017 - 06:43 AM

Hi,

The infection may nor may not be the same.

I will keep this topic open for 6 days. It it returns post fresh FRST and Addition.txt logs for my review.
===

If all is well.

To learn more about how to protect yourself while on the internet read this little guide best security practices keep safe.
http://www.bleepingcomputer.com/forums/t/407147/answers-to-common-security-questions-best-practices/


https://www.bleepingcomputer.com/tutorials/keep-your-computer-safe-online/
Simple and easy ways to keep your computer safe and secure on the Internet.
===




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