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Good morning everyone, 

I'm new in this forum, I really hope you can help me.

Yesterday I've find something strange in the behaviour of the PC: Windows Defender doesn't find any problem but when I open its history it crashes. I've find the name of the maleware before the last crash (Trojan:PowerShell/Mountsi.A!ml). Running MalwareBytes I've found some malewares so I eliminate them but the problem is still there!

Thanks.

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Hello emar and welcome to malwarebytes....

Continue with the following:

If you do not have Malwarebytes installed do the following:

Download Malwarebytes from the following link:

https://www.malwarebytes.com/mwb-download/thankyou/

or,

https://downloads.malwarebytes.com/file/mb4_offline

Double click on the installer and follow the prompts. If necessary select the Blue Help tab for video instructions....

When the install completes or Malwarebytes is already installed do the following:

Open Malwarebytes, select > "settings" > "security tab"

Scroll down to "Scan Options" ensure Scan for Rootkits and Scan within Archives are both on....

Go back to "DashBoard" select the Blue "Scan Now" tab......

When the scan completes quarantine any found entries...

To get the log from Malwarebytes do the following:
 
  • Single click on the target sight above scanner window.
  • In the new window select Report
  • Double click on the Scan log which shows the Date and time of the scan just performed.
  • Click Export > From export you have two options:
    Copy to Clipboard - if seleted right click to your reply and select "Paste" log will be pasted to your reply
    Export toTxt - if selected you will have to name the file and save to a place of choice, recommend "Desktop" then attach to reply

     
  • Please use "Export to Txt" then attach the log to your reply...


Next,

Download AdwCleaner by Malwarebytes onto your Desktop.

Or from this Mirror
 
  • Right-click on AdwCleaner.exe and select user posted imageRun as Administrator (for Windows Vista, 7, 8, 8.1 and 10 users)
  • Accept the EULA (I accept), then click on Scan
  • Let the scan complete. Once it's done, make sure that every item listed in the different tabs is checked and click on the Quarantine button. This will kill all the active processes
  • Once the cleaning process is complete, AdwCleaner will ask to restart your computer, do it
  • After the restart, a log will open when logging in. Please copy/paste the content of that log in your next reply


Next,

Download Farbar Recovery Scan Tool and save it to your desktop.

Alternative download option: http://www.techspot.com/downloads/6731-farbar-recovery-scan-tool.html

Note: You need to run the version compatible with your system (32 bit or 64 bit). If you are not sure which version applies to your system download both of them and try to run them. Only one of them will run on your system, that will be the right version.

If your security alerts to FRST either, accept the alert or turn your security off to allow FRST to run. It is not malicious or infected in any way...

Be aware FRST must be run from an account with Administrator status...
 
  • Double-click to run it. When the tool opens click Yes to disclaimer.(Windows 8/10 users will be prompted about Windows SmartScreen protection - click More information and Run.)
  • Make sure Addition.txt is checkmarked under "Optional scans"
    user posted image
     
  • Press Scan button to run the tool....
  • It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
  • The tool will also make a log named (Addition.txt) Please attach that log to your reply.


Let me see those logs in your reply...

Thank you,

Kevin....
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Hello emar,

Thanks for those logs, continue..

Download attached fixlist.txt file (end of reply) and save it to the Desktop, or the folder you saved FRST into. "Do not open that file when running FRST fix"
NOTE. It's important that both FRST and fixlist.txt are in the same location or the fix will not work.

Open FRST and press the Fix button just once and wait.
The tool will make a log on the Desktop (Fixlog.txt) or the folder it was ran from. Please post it to your reply.

Next,

Download "Microsoft's Safety Scanner" and save direct to the desktop

Ensure to get the correct version for your system....

https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/safety-scanner-download


Right click on the Tool, select “Run as Administrator” the tool will expand to the options Window
In the "Scan Type" window, select Quick Scan
Perform a scan and Click Finish when the scan is done.


Retrieve the MSRT log as follows, and post it in your next reply:

1) Select the Windows key and R key together to open the "Run" function
2) Type or Copy/Paste the following command to the "Run Line" and Press Enter:

notepad c:\windows\debug\mrt.log

The log will include log details for each time MSRT has run, we only need the most recent log by date and time....

Next,

user posted imageScan with Autoruns

Please download Sysinternals Autoruns from the following link: https://live.sysinternals.com/autoruns.exe save it to your desktop.

Note: If using Windows Vista, Windows 7, Windows 8/8.1 or Windows 10 then you also need to do the following:
 
  • Right-click on Autoruns.exe and select Properties
  • Click on the Compatibility tab
  • Under Privilege Level check the box next to Run this program as an administrator
  • Click on Apply then click OK
     
  • Double-click Autoruns.exe to run it.
  • Once it starts, please press the Esc key on your keyboard.
  • Now that scanning is stopped, click on the Options button at the top of the program and verify that the following are checked, if they are unchecked, check them:

    Hide empty locations
    Hide Windows entries

     
  • Click on the Options button at the top of the program and select Scan Options... then in the Autoruns Scan Options dialog enable/check the following two options:

    Verify code signatures
    Check VirusTotal.com

     
  • Once that's done click the Rescan button at the bottom of the Autoruns Scan Options dialog and this will start the scan again, this time let it finish.
  • When it's finished and says Ready. on the lower left of the program window, please click on the File button at the top of the program and select Save and save the file to your desktop and close Autoruns.
  • Right click on the file on your desktop that you just saved and hover your mouse over Send To and select Compressed (zipped) Folder
  • Attach the ZIP folder you just created to your next reply


Thanks,

Kevin...

fixlist.txt

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Run FRST one more time, ensure all boxes are checkmarked under "Whitelist" but only Addition.txt under "Optional scan" Select scan, when done post the new logs. "FRST.txt" and "Addition.txt"

user posted image
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Posted (edited)

Hello emar,

Problem with AutoconfigURL has returned, continue please:

Download attached fixlist.txt file (end of reply) and save it to the Desktop, or the folder you saved FRST into. "Do not open that file when running FRST fix"
NOTE. It's important that both FRST and fixlist.txt are in the same location or the fix will not work.

Open FRST and press the Fix button just once and wait.
The tool will make a log on the Desktop (Fixlog.txt) or the folder it was ran from. Please post it to your reply.

Next,

Please download Zemana AntiMalware and save it to your Desktop.
 
  • Install the program and once the installation is complete it will start automatically.
  • Without changing any options, press Scan to begin.
  • After the short scan is finished, if threats are detected press Next to remove them.


Note: If restart is required to finish the cleaning process, you should click Reboot. If reboot isn't required, please re-boot your computer manually.

Open Zemana again then do the following to get the latest report

Open Reports > select the report in question to highlight > select "Ctrl - A" keys together to highlight full report message > then "Ctrl - C" keys to copy to clipboard > then open notepad and select "edit" then "paste" to copy the report there, then save and attach to reply....

Thanks,

Kevin..

Edited by kevinf80
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Posted (edited)

Apologies.... will attach shortly. Not sure what happened but i`ve lost the file....

 

Edited by kevinf80
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Posted (edited)

Hello emar,

How does your PC respond now, any issues or concerns...?

Thank you,

Kevin

Edited by kevinf80
typo
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Can you zip and attach minidump folder for me to see "C:\Windows\minidump" you will possibly have to copy the folder to your desktop before compressing. I doubt you will be allowed in default directory..

Did you note any error codes as system crashed..?

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Thats` unfortunate no dump files to check.... What exactly happens when the crash occurs, what are you doing. You say "Win Def" are you referring to windows updates...?

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I mean windows defender the built in antivirus. When I open it and I press on the protection history it shows me that he found the malware in the object (now it says also that the threat was eliminated) but after few seconds it the antivirus windows shut down.

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Ok, I understand. Try this please:

Download attached fixlist.txt file (end of reply) and save it to the Desktop, or the folder you saved FRST into. "Do not open that file when running FRST fix"
NOTE. It's important that both FRST and fixlist.txt are in the same location or the fix will not work.

Open FRST and press the Fix button just once and wait.
The tool will make a log on the Desktop (Fixlog.txt) or the folder it was ran from. Please post it to your reply.

FRST will force a reboot, see if Windows Defender now works correctly..

 

fixlist.txt

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Download attached fixlist.txt file (end of reply) and save it to the Desktop, or the folder you saved FRST into. "Do not open that file when running FRST fix"
NOTE. It's important that both FRST and fixlist.txt are in the same location or the fix will not work.

Open FRST and press the Fix button just once and wait.
The tool will make a log on the Desktop (Fixlog.txt) or the folder it was ran from. Please post it to your reply.

 

fixlist.txt

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Hiya emar,

Yes you can delete those files you quote, continue:

Open an elevated command prompt, at the prompt type or copy/paste the following commands. Hit enter key after each command:

CMD: RD /S /Q "%WinDir%\System32\GroupPolicy"
CMD: gpupdate /force
exit

When those commands are completed reboot your system, does that make any difference with Windows Defender...

Thank you,

Kevin.

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