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MBAE64.DLL causing Windows Event ID 3033 (Code Integrity)

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Windows 10 event log ID 3033

"Code Integrity determined that a process (\Device\HarddiskVolume1\Program Files\Mozilla Firefox\firefox.exe) attempted to load \Device\HarddiskVolume1\Program Files\Malwarebytes\Anti-Malware\mbae64.dll that did not meet the Microsoft signing level requirements."

I am unsure at this point if this is Windows 10 AMSI interface being overzealous, Firefox doing something wrong, or the MBAE64.DLL not being fully AMSI compliant?

Why would Firefox want to load YOUR AV routine, surely this is mbae64.dll just trying to check out this executable?

Edited by td47
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  • Staff

***This is an automated reply***


Thanks for posting in the Malwarebytes for Windows Help forum.

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  • Root Admin

Hello @td47

Can we get some logs, please? In general, these issues are often quite transitory and a reboot of the computer typically will not generate the error again in many cases.


Please do the following so that we may take a closer look at your installation for troubleshooting:

NOTE: The tools and the information obtained are safe and not harmful to your privacy or your computer, please allow the programs to run if blocked by your system.

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  • In the User Account Control pop-up window, click Yes to continue the installation
  • Run the MBST Support Tool
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  • In the Advanced Options, click Gather Logs. A status diagram displays the tool is Getting logs from your machine
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Thank you


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@AdvancedSetup I assume that now this is stated as "Working As Designed", your comment about needing MWB logs can be ignored (as this is a Windows generated event log, and NOT an MWB log)? A reboot does NOT fix this condition.

As long as my MWB Premium is functional with this Event 3033 happening, I will ignore it for the time being.

I WOULD like it fixed though, as I was fed up with seeing my Event Logs cluttered with similar Data Integrity logs with Norton Security active, that I have got rid of a while ago, and now continue  ONLY to use (the otherwise excellent) MWB. As an aside, I am NOT a fan of the "working as designed" term, but I know that many software companies use it a lot in their technical responses (Microsoft, Apple etc). I suspect that is why the current state of Firmware in older Routers and IoT devices is such a mess!

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  • Root Admin

Malwarebytes is fully functional. From my understanding, it's more of a nuance of when to step in and allow our product to manage an exploit versus Microsoft. I'm not a developer so they might explain it a bit differently. Regardless, they're aware and will be looking at making some changes in the future.

I hear you on the mess in the Event Logs. I use to be very on top of it during the Windows XP days and my systems were always clean from errors and events in the early days. Today though computers are much more complex and much more capable of so many things. It is almost impossible to keep clean Event Logs.




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