PC Magazine - Security Watch: Some Antivirus Tools Wildly Effective Against Zero-Day Malware

May 28, 2014
By Neil J. Rubenking

A Trojan or other malicious program that's been analyzed by antivirus researchers is very easy to detect and block. Antivirus programs handle such threats using a kind of file fingerprint known as a signature. In many cases, a single well-crafted signature can match a whole family of related malware. The real problem involves detecting zero-day threats; malware or malware variants that have never been seen before. In a recent test by AV-Test Institute, several antivirus tools proved wildly effective against zero-day threats, while others failed miserably.

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