Author Topic: Reliability in danger?  (Read 1812 times)

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Offline Zekobe

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Reliability in danger?
« on: May 24, 2008, 10:12:41 AM »
When I set a test virus on the desk top and  run a
complete virus scan, Avast cannot find anything.

But if I run the file  alone separately  then the virus is found.

Why is that?

This is rising a question of credibily of Avast.

WinXP Home

Any comments?

Offline FreewheelinFrank

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Re: Reliability in danger?
« Reply #1 on: May 24, 2008, 10:16:02 AM »
Do you have the test file in a zip archive and the system scan set not to check archives?
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Offline Zekobe

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Re: Reliability in danger?
« Reply #2 on: May 24, 2008, 11:43:36 AM »
It is openly in a text file on the desk top. Another copy in a folder.

The text is the copy of F-secure pages:
http://www.f-secure.com/v-descs/badtrans.shtml
http://www.f-secure.com/v-descs/badtrs_b.shtml

Maybe because there is not a real virus or even a test virus.
Erratic action to my mind in any case.

On the other hand "eicar" test in the same places behaves in a correct way.

Offline FreewheelinFrank

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Re: Reliability in danger?
« Reply #3 on: May 24, 2008, 12:49:17 PM »
Quote
Maybe because there is not a real virus or even a test virus.

Quite.

Quote
Erratic action to my mind in any case.

The individual file scan may be a deeper scan, probably detecting some of the text from the virus mentioned on the web page as the virus itself. This is probably not best described as "erratic" behaviour, as the scanner is most likely behaving as intended. Try a "thorough" complete scan and you may see the same detection.
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