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Just Wondering


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#1 bbd123

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Posted 16 November 2007 - 12:07 PM

I just ran a virus scan and this showed up "Trojan horse SHeur.ZGG" in C:\WINDOWS\system32\kdwcvx.exe the A.V. program I run deleted it but I was wondering how I got it? I did a Google search for it and nothing relevent to that name showed up. Hopefully all remnants are gone but I'm not all that sure.

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#2 quietman7

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Posted 16 November 2007 - 01:08 PM

Since there is no info on that file its probably new malware. AVG uses heuristic detection which is the ability of an anti-virus program to detect new viruses before the vendor can get samples and update the program's definitions for detection. Heuristics uses non-specific detection methods to find new or unknown malware which allows the anti-virus to detect and stop if before doing any harm to your system. See How AVG Heuristic Analysis Works.

"How did I get infected?, With steps so it does not happen again!".

Edited by quietman7, 16 November 2007 - 01:16 PM.

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#3 bbd123

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Posted 16 November 2007 - 07:15 PM

Thanks quietman7
It's good to know that AVG is doing it's job on the new stuff that is polluting our systems!

#4 quietman7

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Posted 16 November 2007 - 07:43 PM

Your welcome.

The disadvantage to using heuristics is that it is not as reliable as signature-based detection (blacklisting) and can potentially increase the chances that a non-malicious program is flagged as malicious. With heuristics, there is always a potential risk for a "False Positive" when the heuristic analysis flags a file as suspicious or infected that contains no malware. Reducing the detection sensitivity will minimize the risk but then that increases the possibility for new malware to infect your system.
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