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Multitask64.dat virus detected crash windows when antivirus tries to remove it

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2 replies to this topic

#1 Mevon


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  • Local time:09:50 AM

Posted 15 September 2017 - 04:52 PM

Hi, as stated in the title Avira detect a multitask64.dat (winlogon.exe) virus that crash windows when it tries to remove it.


I attached the frst log.



Attached Files

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#2 nasdaq


  • Malware Response Team
  • 40,532 posts
  • Gender:Male
  • Location:Montreal, QC. Canada
  • Local time:02:50 AM

Posted 16 September 2017 - 08:23 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.

I strongly suggest that you update these securiry protrams.
AV: Avira Antivirus (Enabled - Out of date) {B3F630BD-538D-1B4A-14FA-14B63235278F}
AS: Avira Antivirus (Enabled - Out of date) {0897D159-75B7-14C4-2E4A-2FC449B26D32}
AS: Windows Defender (Disabled - Out of date) {D68DDC3A-831F-4fae-9E44-DA132C1ACF46}

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.



(Ammyy LLC) C:\Users\Chiara\Downloads\AA_v3.exe
ShellExecuteHooks: No Name - {5F51FFFE-7463-4220-B711-E5B9ACB8EDFE} - C:\Users\Chiara\AppData\Roaming\tmp546.dat [1952256 2017-08-25] ()
FF Plugin: @microsoft.com/GENUINE -> disabled [No File]
FF Plugin-x32: @microsoft.com/GENUINE -> disabled [No File]
FF ExtraCheck: C:\Program Files (x86)\mozilla firefox\defaults\pref\enpsysau.js [2017-09-04]
CHR HKLM\...\Chrome\Extension: [flliilndjeohchalpbbcdekjklbdgfkk] - hxxps://clients2.google.com/service/update2/crx
CHR HKLM\...\Chrome\Extension: [ipmkfpcnmccejididiaagpgchgjfajgp] - hxxps://clients2.google.com/service/update2/crx
CHR HKLM-x32\...\Chrome\Extension: [flliilndjeohchalpbbcdekjklbdgfkk] - hxxps://clients2.google.com/service/update2/crx
CHR HKLM-x32\...\Chrome\Extension: [ipmkfpcnmccejididiaagpgchgjfajgp] - hxxps://clients2.google.com/service/update2/crx
R2 wtmkussrv; C:\Windows\SysWow64\wtmkussrv.dll [473384 2017-09-04] ()
R1 LanmaMaster; C:\Windows\system32\drivers\lanmamaster.sys [1489000 2017-05-12] () [File not signed] <==== ATTENTION
R1 wtmksyssrv; C:\Windows\system32\drivers\wtmhdnkernel.sys [226856 2017-05-12] ()
S3 VGPU; System32\drivers\rdvgkmd.sys [X]
ContextMenuHandlers1: [AccExt] -> [CC]{2A118EB5-5797-4F5E-8B3D-F4ECBA3C98E4} =>  -> No File
ContextMenuHandlers6: [AccExt] -> [CC]{2A118EB5-5797-4F5E-8B3D-F4ECBA3C98E4} =>  -> No File
Task: {32CF2954-3A28-48C0-9A63-DCFD539753D3} - System32\Tasks\{6A52446A-F8E4-4F75-8B48-5DA09119D30B} => rundll32.exe "C:\Users\Chiara\AppData\Local\Microsoft\TaskPlay\caches.dat",StaticCache
Task: {641A4554-39CD-4488-93DA-660528B3A965} - System32\Tasks\bce9679b378fef95cb1f20ce4894ea1e => sc start bce9679b378fef95cb1f20ce4894ea1e <==== ATTENTION
2017-09-04 21:52 - 2017-08-25 23:33 - 001952256 ___SH () C:\Users\Chiara\AppData\Roaming\tmp546.dat
2017-09-04 21:46 - 2017-09-04 21:46 - 000473384 _____ () c:\windows\syswow64\wtmkussrv.dll
2017-06-30 21:53 - 2017-05-12 20:24 - 001357512 ____N () C:\Windows\system32\LanmaMasterHelp.dll
C:\Program Files (x86)\mozilla firefox\defaults\pref\enpsysau.js

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.

Please download Malwarebytes Anti-Malware from here
  • Right-click on the MBAM icon and select Run as administrator to run the tool.
  • Click Yes to accept any security warnings that may appear.
  • Once the MBAM dashboard opens, on the right detail pane click on the word "Current" under the Scan Status to update the tool database.
  • On the left menu pane click the Settings tab, and then select the Protection tab on the top.
  • Under the Scan Options, turn on the button Scan for rootkits and Scan within archives.
  • Click the Scan tab on the right detail pane, select Threat Scan and click the Start Scan button
  • Note: The scan may take some time to finish, so please be patient.
  • If potential threats are detected, ensure to checkmark all the listed items, and click the Quarantine Selected button.
  • While still on the Scan tab, click the View Report button, and in the window that opens click the Export button, select Text file (*.txt), and save the log to your Desktop.
  • The log can also be viewed by clicking the log to select it, then clicking the View Report button.
Please post the log for my review.

Note: If asked to restart the computer, please do so immediately.

Please download AdwCleaner by Xplode onto your Desktop.
  • Close all open programs and internet browsers.
  • Double click on AdwCleaner.exe to run the tool.
  • Click the Scan button and wait for the process to complete.
  • Click the LogFile button and the report will open in Notepad.
  • If you click the Clean button all items listed in the report will be removed.
If you find some false positive items or programs that you wish to keep, Close the AdwCleaner windows.
  • Close all open programs and internet browsers.
  • Double click on AdwCleaner.exe to run the tool.
  • Click the Scan button and wait for the process to complete.
  • Check off the element(s) you wish to keep.
  • Click on the Clean button follow the prompts.
  • A log file will automatically open after the scan has finished.
  • Please post the content of that log file with your next answer.
  • You can find the log file at C:\AdwCleanerCx.txt (x is a number).

Please post the logs and let me know what problem persists with this computer.

#3 nasdaq


  • Malware Response Team
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  • Location:Montreal, QC. Canada
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Posted 22 September 2017 - 08:24 AM

Due to the lack of feedback, this topic is now closed.

In the event you still have problems, please send me or any Moderator a Private Message and ask them to reopen this topic within the next 5 days.

Please include a link to your topic in the Private Message. Thank you.

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