how to understand that a file is a risk file ?

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hi guys , i want to understand that how antivirus know that a file is a Dangerous file and how can find this file ?

Posted 15-May-12 6:06am

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-05-15T06:15:00

Please see:
http://en.wikipedia.org/wiki/Antivirus_software#Identification_methods[^],
http://en.wikipedia.org/wiki/Rootkit#Detection[^].

In modern anti-virus software, it's always a combination of methods. Signature-based detection helps to detect known viruses, save time on detection and eliminate false negatives for at least known ones; heuristic methods help to detect unknown and "polymorphic" ones.

—SA

Posted 15-May-12 6:15am

Comments

Maciej Los 15-May-12 12:23pm

Great answer! +5

Sergey Alexandrovich Kryukov 15-May-12 13:41pm

Thank you very much. No wonder someone voted 1 :-).
--SA