'Drive-by' email infects readers immediately
For the past few years, drive-by downloads have been the bane of computer-security professionals. These malicious Trojans lurk inside seemingly innocuous Web pages and try to infect any browser that visits them. If a user doesn't have strong anti-virus software installed on his PC, he'll be immediately infected just by looking at the Web page.
Now this "instant-infection" threat has moved to an even more dangerous forum: email. A new class of drive-by email messages has been discovered that infect users who simply view a message, or possibly just glance at it in a preview window.