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MBAM exessive CPU and memory usage


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Hey guys,

I've noticed MBAM uses a lot of CPU, every time my system boots up or resumes from sleep. I think this is related due to OneDrive synch. I have 3 OneDrive clients running (1x personal, 2x business) with quite some file changes. It seems that MBAM scans those files rigorously every time changes are detected, resulting in a nearly locked-up system for an extensive period of time. The screenshot I attached to this post shows the CPU usage around 5 min after boot time, OneDrive processing around 100 file changes.

The problem is even worse when I have a lot of file changes (500+) or very big files (4GB+). If OneDrive downloads this kind of data, MBAM memory usages goes through the roof as well, consuming almost all available system memory. This forced me a couple of times to completely quit the MBAM service, which obviously is undesired.

I have observed this behavior at my laptop (specs below), but also at other systems that are using OneDrive.

  • i7-6600 CPU (2.8 Ghz)
  • 16GB RAM
  • 1TB SSD (Default that came with Surface Book gen1)
  • 64 bit Windows 10 20H2

I do understand in this scenario CPU is consumed by a combination of MBAM, OneDrive and Windows Search - all of which are disk related. However, on systems not running MBAM I don't experience lock-up situations. As a general concern I'd say overall system performance is hit hard by having MBAM installed, and OneDrive maybe could be affected by MBAM as well.

What's your look on it?

mbamcpu.thumb.png.c702a4a46c796edd22e57003e033ecea.png

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  • Staff

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Greetings,

Please try disabling Ransomware Protection to see if that eliminates the high resource usage.  If it does, it's likely because all of that file activity is triggering Ransomware Protection to analyze it, though I'm not sure how to resolve it short of creating an exclusion for OneDrive's process by following the instructions under the Allow a file or folder section of this support article, selecting the option to exclude the item from detection as ransomware, at least until the Developers can investigate and hopefully work out a solution on their end.

Please let us know how it goes.

Thanks

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  • 2 weeks later...
On 2/2/2021 at 12:13 PM, exile360 said:

Greetings,

Please try disabling Ransomware Protection to see if that eliminates the high resource usage.  If it does, it's likely because all of that file activity is triggering Ransomware Protection to analyze it, though I'm not sure how to resolve it short of creating an exclusion for OneDrive's process by following the instructions under the Allow a file or folder section of this support article, selecting the option to exclude the item from detection as ransomware, at least until the Developers can investigate and hopefully work out a solution on their end.

Please let us know how it goes.

Thanks

Hi Exile360,

Thanks for your reply. I will try this, although I'd have to say the idea of disabling ransomware protection isn't really re-assuring. However, I can imagine that a lot of simultaneous file changes exactly could be a red flag when it comes to ransomware, therefore making MBAM doing overtime.

On 2/2/2021 at 4:57 PM, Porthos said:

It also could be from a missed scan running.

 What would be the proper way to determine if this causes the issue? Look in the GUI and see if a scan is running? Although I agree this could sometimes happen, the issue is most prominent with a lot of file changes. Perhaps it does make the problem worse when it both tries to scan all the file changes and a scheduled scan is running at the same time.

On 2/3/2021 at 3:28 AM, AdvancedSetup said:

Hello @Eagle Creek

Can we please get some logs

Upload Malwarebytes Support Tool logs offline

Thanks

 

Of course you may have my logs. Is there, with regards to privacy, any need for me to encrypt/password protect the logs before I attach them?

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  • 3 weeks later...

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