Andrew has sent me an article detailing how popular anti-virus software deals with threats not present in standard AV signatures:
The winner of this antivirus sweepstakes was a product called Avira, which managed to detect and defeat 71 percent of the unknown malware. Right behind it was the equally-obscure NOD32, which swept away 68 percent of the threats. The more well-known commercial products fared more poorly. Norton Antivirus and McAfee tied at a mere 24 percent, while Microsoft’s OneCare did even worse by only identifying 18 percent of the new threats. Resting at the bottom of the barrel were Kaspersky and eScan at nine percent, and AVG, which detected only eight percent of malicious software in addition to producing many false positives.
I’m SO glad I use NOD32 then. 😀
The article is from last year though, and is consequently on the outdated side. If you hear of a more recent study, please put the link in the comments… 😉