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False negatives?

josephtenzin

Just installed Sophos Anti-Virus Home Edition.

Updated the virus list.

Ran local drive scan.

Results-No Threats Detected

But 4 days ago I ran ClamXav and it found 37 contaminated files:  phsing, Trojan etc.  Did not do anything with the files since removal on ClamXav requires a level of skill that is beyond me.

Why did Sophos miss these files?

Your help is much appreciated.

:1012010


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    Hello josephtenzin,

    very unlikely that Sophos misses a number of genuine threats. There's a grey area - especially with generic detections - where you can't really tell if that "something" is harmful or not. Either decision could be false. Has ClamXav's log been removed with the application? If not, you should check what the detections mean and if they indeed are definite (as opposed to generic) detections please send the samples to Sophos.(please see the sticky topic on this board for details).

    Christian 

    :1012014
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  • 0

    Hello josephtenzin,

    very unlikely that Sophos misses a number of genuine threats. There's a grey area - especially with generic detections - where you can't really tell if that "something" is harmful or not. Either decision could be false. Has ClamXav's log been removed with the application? If not, you should check what the detections mean and if they indeed are definite (as opposed to generic) detections please send the samples to Sophos.(please see the sticky topic on this board for details).

    Christian 

    :1012014
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