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Malwarebytes appears to be crashing Outlook 365

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Using Malwarebytes Premium

Windows 10 Pro 64-bit

Outlook 365 [Office Suite]


Certain e-mails in my inbox cause Outlook to crash to desktop. When I re-open Outlook, it returns to the state it was in the last time I opened it before the crash. Read e-mails are unopened. Sent e-mails are not in the Sent Folder. Etc. Below is the notice. Any ideas?


-Log Details-
Protection Event Date: 10/24/20
Protection Event Time: 3:31 AM
Log File: e1933e48-15ca-11eb-844b-e470b8fe15db.json

-Software Information-
Components Version: 1.0.1070
Update Package Version: 1.0.31916
License: Premium

-System Information-
OS: Windows 10 (Build 19041.608)
CPU: x64
File System: NTFS
User: System

-Exploit Details-
File: 0
(No malicious items detected)

Exploit: 1
Malware.Exploit.Agent.Generic, C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\FLTLDR.EXE C:\Program Files\Common Files\Microsoft Shared\GRPHFLT\JPEGIM32.FLT, Blocked, 0, 392684, 0.0.0, , 

-Exploit Data-
Affected Application: Microsoft Outlook
Protection Layer: Application Behavior Protection
Protection Technique: Exploit payload process blocked
File Name: C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\FLTLDR.EXE C:\Program Files\Common Files\Microsoft Shared\GRPHFLT\JPEGIM32.FLT


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2 hours ago, richfed said:

Certain e-mails in my inbox cause Outlook to crash to desktop. When I re-open Outlook

Please open Malwarebytes and navigate to settings by clicking the small gear icon in the upper right, then select the Security tab and scroll down to the Exploit Protection section.  Once there, be sure that the option to block penetration testing attacks is set to Off, then click the Advanced settings button and click on Restore Defaults located at the bottom of the advanced settings dialog.

Once that is done, wait around 30 seconds or so for the protection to refresh itself, then try opening Outlook again to determine whether the issue has been fixed or not.

Please let us know how it goes.


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  • 4 months later...

Ohh goodness, we have expended DAYS on this. Multiple users started reporting Outlook crashing. One of them was nearly all the time so we treated her as a new starter, backed up her data and re-created her M365 account - treated as a new starter. No difference. I was just updating the directors on the problem when MWB occurred to me. I forgot the basic IT mantra - when something weird is going on, blame the virus scanner...

My client uses Nebula - is there a similar setting in there? Or should I raise a business support ticket? I am hoping and praying this is the problem in the business version as well...

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