.wmv file scan

Avast Free Antivirus / Premium Security
1

Hello All,

I just scanned a downloaded 2.00 GB .wmv file with avast which it completed in less than a second and found no threat. Normally a file scan this size would take several minutes to complete.

I scanned it with Malwarebytes and it did the same thing. super fast and no threats.

I don’t have anything in my exclusions settings.

The file plays normally with my media player.

Any ideas what’s causing the scanners to behave this way?

Thanks for any assistance.

2

Malwarebytes doesn’t even read in non-PE files, as for avast, probably only certain parts need to be scanned

3

Hello and welcome to the forums mike54g,

There is scanning engine update and some behavior are changed.
See my post and igor’s answer:
http://forum.avast.com/index.php?topic=80315.msg659272#msg659272

Is there some changes to scanning engine? Just noticed scanning speed increases dramatically in movie file scanning (finished less than 1 sec with "Test whole files" enabled). As far as I remember it takes seconds to scan this kind of big files...
Yes, though it has nothing to do with the new program build (it's inside of the virus definitions).
4

OK. That’s great to know.

I will take some time to further read those posts and links.

Thanks for your assistance.