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Former Member
Message 1 of 4

.DAT files as email attachments

Hello i work for a company that is sending purchase orders via email and we have 3 out of about 50 vendors who are having the attached PDF converted into DAT files on the vendors end. I've been working with one of the vendors who said the files receives are avvclean.dat, avvnames.dat and avvscan.dat. When i googled these it seemed that these were McAfee file names. I couldn't find any information on why they would be in the email though instead of the PDF. I was hoping someone who usese the product could maybe shed some light on this for me? I don't know anything about the McAfee our vendor is using but if you need more info let me know and i can try and get that info from them.

Thank you,


3 Replies
Message 2 of 4

Re: .DAT files as email attachments

Those files would be included in either an extra.dat sent out by McAfee Labs to cover an erroneous detection or by an IT department in order to update VirusScan in some way, I would imagine, although I know nothing about Enterprise product inner workings.

You are posting in Home Products and I think you are talking about Enterprise/Business.

Can you name the McAfee product please?   You may need to contact whomever does your IT,

Message was edited by: Ex_Brit on 22/05/12 5:17:14 EDT PM
Former Member
Message 3 of 4

Re: .DAT files as email attachments

sorry for posting here if it's incorrect. I'm not sure the product but he sent me an email with a screen shot of his mcafee and it says "About McAfee Interenet Security" and the version is 15.0 build 15.0.300 does that help at all?

Message 4 of 4

Re: .DAT files as email attachments

I needed to ascertain whether or not it was a home or business's home so I moved this to SecurityCenter.   I  think in this case that the person(s) whose machine(s) is/are exhibiting the behaviour should contact Technical Support directly.  It is free of charge and a simple phone call away.  See the link under Useful Links at the top of this page.

It's rather a coincidence that these pdf's should be converted to an actual McAfee update file as that could indicate that the wrong file is being sent in the first place, assuming updates are not what this is all about.

It's certainly a rather bizarre thing to happen.

Or they may simply need to re-associate .pdf with the right application and that varies with the operating system, and is outlined here:

Or it could be the result of an infection of some sort but that is only a wild guess.  There are some tools for that here:

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