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Malwarebytes is using ALL my RAM (16GB+)


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Title pretty much says it all.  My system just crawled to a halt and had to reboot, but right before I did I noticed my RAM usage was at 31GB.  After the reboot, I opened up task manager and Malwarebytes was using 15GB and within a minute or two it was over 20GB and still climbing.  There was no scan or anything taking place.

 

Is there anything obvious that might be causing this?  I've had to turn the program off to avoid it from using all my RAM again.  Thanks in advance

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***This is an automated reply***

Hi,

Thanks for posting in the Malwarebytes for Windows Help forum.

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I just had the same problem, I noticed that a lot of my apps had crashed all at once for no reason, and my fans were going at max speed. I checked the task manager and malwarebytes service was using around 95% of my ram. I tried ending the task multiple ways and it always just gave a message saying access denied. It was so bad that my computer ended up going to a black screen twice and I ended up just uninstalling malwarebytes to make it stop. I have no idea what could of caused this problem. Possibly a bad update?

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28 minutes ago, Drayden said:

Is there anything obvious that might be causing this?  I've had to turn the program off to avoid it from using all my RAM again.  Thanks in advance

Can you please collect and upload as an attachment the diagnostic data using our MBST?

  • Download and run the Malwarebytes Support Tool
  • Accept the EULA and click Advanced tab on the left (not Start Repair)
  • Click the Gather Logs button, and once it completes, attach the zip file it creates on your desktop to your next reply
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2 minutes ago, Hoofbites said:

I'm seeing this as well.

@Hoofbites Do the following.

Please do the following Uninstall and reinstall using the Malwarebytes Support Tool

Please have lots of patience with the tool.  The first phase is a cleanup and does require a Windows Restart.
After the Restart, it may take 2 - 3 - 4 minutes till the Support tool screen shows up.   Please be patient and have faith.  Wait for it, whatever it takes.
The 2nd phase is where it offers to do a new Install.

Then follow the instructions in this topic after the clean install and before you do your first scan.

 

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Just now, SupaMan said:

Having the same issue...

We need the following from all with this issue.

Can you please collect and upload as an attachment the diagnostic data using our MBST?

  • Download and run the Malwarebytes Support Tool
  • Accept the EULA and click Advanced tab on the left (not Start Repair)
  • Click the Gather Logs button, and once it completes, attach the zip file it creates on your desktop to your next reply

 

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1 minute ago, Porthos said:

We need the following from all with this issue.

Can you please collect and upload as an attachment the diagnostic data using our MBST?

  • Download and run the Malwarebytes Support Tool
  • Accept the EULA and click Advanced tab on the left (not Start Repair)
  • Click the Gather Logs button, and once it completes, attach the zip file it creates on your desktop to your next reply

 

Hi Porthos, as suggested in your earlier post, I used the Support tool to uninstall and reinstall (which didn't require a Windows restart btw), and it seems to have fixed the memory leaking issue.

Not sure if there's anything useful in these logs still since I uninstalled/reinstalled, but here they are:

mbst-grab-results.zip

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13 minutes ago, SupaMan said:

as suggested in your earlier post, I used the Support tool to uninstall and reinstall

Those instructions were not for any other user except the one I addressed. We really could have used the logs before the reinstall.

Keep an eye on it though. I also see an issue with Windows Defender as well.

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I had the exact same thing happen as well.  I've been freaking out for the past two hours thinking it was a malware attack.  Now seeing so many others with this same problem, I'm thinking it's probably a bad MBAM update.  When I browsed to my MBAMService\logs folder, every single one of my MBAMSERVICE.LOG files (MBAMSERVICE.LOG.bk1, MBAMSERVICE.LOG.bk2, etc...) were completely filled (10MB each) within the past 30 min.  Can anyone else browse to their logs and see if they have the same situation?

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Mine were also filled up but the time in the date modified field was today at 1:19am which was when the first of many entries started in the event log warning of a low virtual memory condition. I did notice in General Tab of MWB Settings that the option to collect enhanced event log data for support (not recommended) was selected. I don't ever recall turning that on.

I checked 2 other systems and they did not have the option checked and did not seem to be exhibiting any high memory usage problems. All 3 systems are running Version 4.3.0.98 with update package 1.0.38137. The 2 unaffected systems are running Component package version 1.0.1173 whereas the affected system is running version 1.0.1217.

I turned that event log option off to see if that helps

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11 minutes ago, MJL said:

Mine were also filled up but the time in the date modified field was today at 1:19am which was when the first of many entries started in the event log warning of a low virtual memory condition. I did notice in General Tab of MWB Settings that the option to collect enhanced event log data for support (not recommended) was selected. I don't ever recall turning that on.

I checked 2 other systems and they did not have the option checked and did not seem to be exhibiting any high memory usage problems. All 3 systems are running Version 4.3.0.98 with update package 1.0.38137. The 2 unaffected systems are running Component package version 1.0.1173 whereas the affected system is running version 1.0.1217.

I turned that event log option off to see if that helps

My issue was almost identical.  My Windows Event Log shows the low virtual memory condition starting at 1:12am.  Could you do me a favor, MJL?  Could you check your logs folder (located at c:\ProgramData\MalwareBytes\MBAMService\logs), and tell me if you have a bunch of MBAMSERVICE.LOG files that we all modified today?

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Ladies and gentlemen,

We know about this problem now and can tell it will happen when a scan is scheduled to the time of Daylight Savings adjusting.

The work around for it is to delete all scheduled tasks, restart MBAM (or reboot machine) and create a new scheduled scan.

We are working on a fix for this and will post as soon as we have it ready for release.

Thank you so much for your patience,

 

-Erix

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23 minutes ago, Erix said:

Ladies and gentlemen,

We know about this problem now and can tell it will happen when a scan is scheduled to the time of Daylight Savings adjusting.

The work around for it is to delete all scheduled tasks, restart MBAM (or reboot machine) and create a new scheduled scan.

We are working on a fix for this and will post as soon as we have it ready for release.

Thank you so much for your patience,

 

-Erix

 

Thank you for letting us know.  This might be a big ask, but can you confirm for me if this is why every one of my MBAMSERVICE.LOG files were all completely filled with mostly:

DEBUG TaskScheduler mb::common::misc::ScheduledTask::MyTimerAPCProc "taskscheduler.cpp"

DEBUG TaskScheduler mb::common::misc::ScheduledTask::Schedule               "taskscheduler.cpp"

DEBUG TaskScheduler mb::common::misc::ScheduledTask::MyTimerAPCProc "taskscheduler.cpp"

DEBUG TaskScheduler mb::common::misc::ScheduledTask::Schedule               "taskscheduler.cpp"

DEBUG TaskScheduler mb::common::misc::ScheduledTask::MyTimerAPCProc "taskscheduler.cpp"

DEBUG TaskScheduler mb::common::misc::ScheduledTask::Schedule               "taskscheduler.cpp"

over and over and over?  Thank you.

 

 

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  • Solution

Malwarebytes Service restart should be sufficient.  Bug is made worse due to DEBUG logging being enabled, which causes the excessive logging and memory consumption.  It's a bug that got out and we will fix it and ensure it does not happen again.

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14 hours ago, Sparkoson said:

Restart of application and Reboot of system did not resolve issue for me. Resolved after full Reinstall.

During what time did you do the reboot?  After 3am on March 14, 2021, you should not have experienced the issue.  Did you have Debug logging turned on? 

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