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After about an hour of normal operation this morning, I noticed that Web Protection had turned off. Malwarebytes is fully up to date with version 3.5.1, Component 1.0.374, and update 1.0.5556. I quit Malwarebytes and restarted it, but got a message notification that Malwarebytes is unable to load the Anti-Rootkit DDA Driver. This error may be due to rootkit activity --- and recommended rebooting. After reboot, web protection was back on and a Threat Scan found nothing. A full scan with Kaspersky Total Security 2019 also found nothing wrong. No problem currently but I am attaching the mbst-grab-results for your information.

mbst-grab-results.zip

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Greetings,

It's likely that this issue was caused by a known compatibility issue with Kaspersky.  It seems that some of the features in Kaspersky's recent releases have occasionally caused issues for some Malwarebytes users under certain conditions.  As long as everything is working OK now then you should be fine, however if the issue returns please let us know and we'll investigate further.

In the meantime you can also configure exclusions between Kaspersky and Malwarebytes for one another as that might help to at least reduce the chances of any conflicts going forward if you haven't done so already.  The list of files to exclude from Kaspersky for Malwarebytes can be found here and instructions on how to exclude items from Malwarebytes may be found here (you want the Exclude a File or Folder option, then exclude Kaspersky's Program Files folder as well as its data folder under C:\ProgramData as well as its drivers which will be digitally signed by Kaspersky Labs and will be located under C:\Windows\System32\drivers).

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3 hours ago, exile360 said:

Greetings,

It's likely that this issue was caused by a known compatibility issue with Kaspersky.  It seems that some of the features in Kaspersky's recent releases have occasionally caused issues for some Malwarebytes users under certain conditions.  As long as everything is working OK now then you should be fine, however if the issue returns please let us know and we'll investigate further.

In the meantime you can also configure exclusions between Kaspersky and Malwarebytes for one another as that might help to at least reduce the chances of any conflicts going forward if you haven't done so already.  The list of files to exclude from Kaspersky for Malwarebytes can be found here and instructions on how to exclude items from Malwarebytes may be found here (you want the Exclude a File or Folder option, then exclude Kaspersky's Program Files folder as well as its data folder under C:\ProgramData as well as its drivers which will be digitally signed by Kaspersky Labs and will be located under C:\Windows\System32\drivers).

Thanks for the reply. I have had full Exclusions and Trusted Applications listed for Malwarebytes in Kaspersky for a long time and updated them in Malwarebytes recently when I updated Kaspersky to the 2019 version. I have the six Malwarebytes executables in Kaspersky Trusted Applications and the Malwarebytes folders plus 6 drivers in Exclusions.

As to the Exclusions in Malwarebytes for Kaspersky, I have only been excluding the Program Files folder and the Kaspersky executables listed in the Program Folder. I just now added C:\ProgramData\Kaspersky Lab and Kaspersky Lab Setup Files folders. I apparently need to add the Kaspersky\system32\drivers you refer to but I will need to find a list of which ones to add. If you have a link to that information, I would appreciate it.

I will let you know if it occurs again.

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The easiest way to locate Kaspersky's drivers would likely be to navigate to C:\Windows\System32\drivers and make sure the folder is being displayed in Details view (small icons with several columns showing various info about each file/folder in the directory) then right-click on one of the column headers and select More... then scroll through the list until you locate Company and check the box next to it then click OK then scroll to the right to locate the newly added Company column and click on it to sort the items by company name and locate all the items that list Kaspersky or Kaspersky Labs as the company.  Most if not all of them will start with the letter k, but some might not so sorting by company name makes it easier.

You could also use a tool such as MS Sysinternals Autoruns and look at the Drivers tab to locate them as it should list all of them there, including the company info and file name (just be sure to run Autoruns as administrator so it has admin privileges).  You can get Autoruns from here.

Edited by exile360
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27 minutes ago, exile360 said:

The easiest way to locate Kaspersky's drivers would likely be to navigate to C:\Windows\System32\drivers and make sure the folder is being displayed in Details view (small icons with several columns showing various info about each file/folder in the directory) then right-click on one of the column headers and select More... then scroll through the list until you locate Company and check the box next to it then click OK then scroll to the right to locate the newly added Company column and click on it to sort the items by company name and locate all the items that list Kaspersky or Kaspersky Labs as the company.  Most if not all of them will start with the letter k, but some might not so sorting by company name makes it easier.

You could also use a tool such as MS Sysinternals Autoruns and look at the Drivers tab to locate them as it should list all of them there, including the company info and file name (just be sure to run Autoruns as administrator so it has admin privileges).  You can get Autoruns from here.

Great help. Thanks very much. I tried both methods and Autoruns identified an additional driver not in the System32 folder: C:\ProgramData\Kaspersky Lab\AVP19.0.0\bases\klids.sys

Should this one also be excluded?

Thanks again.

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