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"Clean" viruses?

[Cramp, Edmund]
Edmund Cramp
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Edmund Cramp - 12:58pm, Nov 24 2020

The message headers are:

X-SPScan-Result: infected
X-SPScan-VirusName: HTML/Agent.CN
X-MDBadQueue-Reason: WARNING! infected with virus (HTML/Agent.CN)
X-MDAV-Result: clean

My policy is to quarantine everything suspicious so it's not a problem but I'm seeing a few of these, in addition the daily virus statistics are not recording them - I guess probably because it's an infection attempt, not an actual virus in the message? I'm sending all of the messages to virusfn@mdaemon.com

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Edmund Cramp - Apr 6, 2022 7:50 am (#15 Total: 18)  

 

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Edmund Cramp
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This is just an idea, MD can scan all the mailboxes everyday and occasionally finds infections in users spam folders, but I'm quarantining virtually all messages with attachments that I see as potential infections ... e.g. *.gz, *.zip, *.bat, *.exe etc., and then I check suspicious messages by uploading them to VirusTotal after reviewing the headers.
It might be a useful option for the future to add the option to do an AV scan of quarantine folder contents every hour.


Arron Caruth - Apr 6, 2022 8:12 am (#16 Total: 18)  

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What is the end goal?  

In cases where attachment restrictions have quarantined a message, the best route, in my opinion, is to get the file to the AV vendors as quickly as possible so that they can update their systems to detect the malicious content and future messages can be handled based on your AV configurations.

What would you have done with messages that were found to be malicious?  What about messages that were found to be clean?  Or would all the messages just sit in the queue and be scanned every hour, over and over and over?

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On Wed, 6 Apr 2022 07:50:48 -0500, "lists-md-anti-virus@mdaemon.com (Edmund Cramp)" <lists-md-anti-virus@mdaemon.com> wrote:
This is just an idea, MD can scan all the mailboxes everyday and occasionally finds infections in users spam folders, but I'm quarantining virtually all messages with attachments that I see as potential infections ... e.g. *.gz, *.zip, *.bat, *.exe etc., and then I check suspicious messages by uploading them to VirusTotal after reviewing the headers.
It might be a useful option for the future to add the option to do an AV scan of quarantine folder contents every hour.




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--POWERED BY MDAEMON!------------------------------------------------

---------------------------------------------------------------------
These forums are provided by MDaemon Technologies for user-to-user
support and discussion.  MDaemon staff members may participate in the
forums periodically but please recognize that this is not the official
method of receiving technical support. To receive personal technical
support please use the form here:
http://www.mdaemon.com/Support/RequestSupport/
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Edmund Cramp - Apr 6, 2022 8:38 am (#17 Total: 18)  

 

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Edmund Cramp
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The only "end goal" for us is to avoid infections.
I expect that scanning the quarantined message that MD has not detected via VirusTotal is updating the AV vendors. I also send them to MD via the quarantine reporting option but a lot of time the messages are rejected - I see that as a good thing but since the quarantine queue hasn't been scanned it's a little work for me.
When VirusTotal says it's a malicious message then I delete it. Clean quarantined messages are reviewed but that's very rare to find a clean quarantine.
I just see a repeated scan of the quarantine queue as relatively low processing cost but making the AV a little more efficient - this is just an idea, I'm only a mail-server user ... any happily confident using MD, it's stopping malware all the time every day.



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