ESET security researchers have uncovered a new wave of spam that tries to install the Koobface worm.

"Uncovered by ESET researchers in Latin America, this latest Koobface campaign is sending Facebook users messages with a link that claims to direct them to videos of sexual encounters," writes CNET News' Lance Whitney. "The link included in the e-mails tells the user to download a video codec to view the X-rated content."

"But instead of delivering the goods, the link calls up a download that launches the Koobface malware, thus infecting its intended victim," Whitney writes.

Click here to read the CNET News article.