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Each of the last three days now as well as about a week ago, MalwareBytes has detected an attack that locks up my computer and turns both of my screens grey.  I am able to open the Task Manager and restart or sign out and then back in but why does this keep happening?

I seem to be able to work just fine after this but it's very frustrating and making me wonder just what kind of attacks these are?  

It seems that the lockup happens when I hit the save button in Microsoft Excel on a file that is saved in my Dropbox.

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Hello CountryFisherman and welcome to malwarebytes....

Continue with 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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Topic has been reopened per request.

Thanks

 

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Do not see any obvious Malware or Infection in the FRST logs.. Continue:

Please download Malwarebytes Anti-Rootkit from here
 
  • Right click on the tool (select "Run as Administrator) to start the extraction to a convenient location. (Desktop is preferable)
  • Open the folder where the contents were unzipped and run mbar.exe
  • Follow the instructions in the wizard to update and allow the program to scan your computer for threats.
  • Click on the Cleanup button to remove any threats and reboot if prompted to do so.
  • Wait while the system shuts down and the cleanup process is performed.
  • Perform another scan with Malwarebytes Anti-Rootkit to verify that no threats remain. If they do, then click Cleanup once more and repeat the process.
  • When done, please post the two logs produced they will be in the MBAR folder... mbar-log.txt and system-log.txt

Thanks,

Kevin

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I'm not at home right now but will run mbar.exe when I get home this evening.

Is it possible that these are targeted attacks?

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Systems are always under attack, your Firewall will block many so will other security you have installed. One of the pitfalls of using Windows I guess. If your security is updated it should keep you safe...

Post the mbar logs whenever you`re ready...

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Thats` good to hear, one last problem that may cause problems with your system. There are two Firewalls active, McAfee and Zonealarm, one of those needs to be removed or at least disabled...

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I have no preference, I personally use Windows Defender Firewall. I suppose if I had to choose I`d get rid of Zonealarm....

What is the current status of your system, any remaining issues or concerns...?

 

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The computer seems to be running fine.  It's just that for the last three evenings, not long after turning the computer on, it locks up and the screens go grey.

Is it normal for this happen like that?  It's a little unnerving.

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That certainly does not sound normal, is it still happening now when you boot up..?

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I booted up at lunch to run MBAR.  Didn't have any issues then, but I did that pretty quickly.  Sometimes it takes about half an hour or so.  Also, it seems to happen when I hit the save button on a Microsoft Excel Spreadsheet that is saved in Dropbox.  Not sure if that is just a coincidence or not?  I should know more tonight when I fire it up to do some work.  Sure have appreciated your help with this.  It's quite refreshing.

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Thanks for the update, if no issues tonight I believe we can bring this to a close....

Cheers,

Kevin.

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Glad we could help.

If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this topic with your request.

This applies only to the originator of this thread. Other members who need assistance please start your own topic in a new thread.

Please review the following for Tips to help protect from infection

Thank you

 

 

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