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[ RESOLVED ] excel libreoffice libreoffice-calc exploit


Go to solution Solved by Porthos,

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Greetings,

I've used MalwareBytes for a long time... Like almost 10 years ago. With great success and much satisfaction. Many many many PuP's and malwares and all sorts of threats detected and remediated. Many thank-you's to the MB team for that.

So I was concerned earlier when I tried to run LibreOffice Calc earlier and it was blocked by MBAM. So I did some research, checked some hashes, manually uninstalled LibreOffice, updated LibreOffice to the newest stable version (7.2.6) and made sure *not* to enable quick starts (which I'm quite sure I had done originally as I don't need most programs to be open before I ask them to be), tried to check a PGP signature (which isn't easy for me on Windows) and then updated to the newest LibreOffice version (7.3.2) (this time, I didn't enable quick start or even install the quick start component or online update service). Still blocked. As is LibreOffice Writer.

Then I gave up and got a free trial of Office365 (even though I'd rather use Calc than Excel) because I *really* need to do a spreadsheet. Then, the *first* time I tried to make a new spreadsheet, MBAM killed Excel. But the next time, Excel loaded fine. I'm extremely hesitant to simply disable exploit protection for LibreOffice, especially when this is something that people using MB software are known to do. If this is the only way, that's what I'll do (and trust in the security protocols on ODF's end and the non-exploit-protection features of MBAM), but I'm not expert enough to be sure that there isn't some present or active threat on my end without more information.

Detection history attached.

Thanks!

excel_blocked_mbam.txt libreoffice_calc_blocked_mbam.txt libreoffice_writer_blocked_mbam.txt

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  • Solution
27 minutes ago, jcl42 said:

Detection history attached.

Please open Malwarebytes and go to security and exploit settings and click advanced.

image.png.d690c8af6274dfb080c4f34c1db6adc3.png

Click Restore defaults and then click apply. Chose Malwarebytes and restart the computer for good measure.

Then see if it fixes the issue.

image.png.0a376bd44b1a3a36eef2432ef9bed118.png

Edited by Porthos
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Just now, jcl42 said:

Huh. I don't remember messing with those settings, but I might have. Fixed, thanks!!!

Do not change Malwarebytes defaults. It can lead to issues like this and False Positives.

The setting that was changed was the following. It should have been off.

image.png.19b6088a1db47fa78db8aed8da1aa818.png

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