SophosLabs researcher Brett Cove warns that Canadian online pharmacy spammers have begun embedding audio clips in their messages to avoid detection by security filters and e-mail clients.

"According to the expert, SophosLabs recently began seeing the MP3-laden e-mails coming across its wires, marking only the second time the company has ever observed the use of such multimedia technology to try to defeat spam filters," writes eWeek's Matthew Hines. "The other instance of audio spam appeared back in 2007 when stock spamming had reached a critical mass and scammers were similarly forced into creating new tactics to respond to filters being tuned to find the keywords typically found in such messages."

"In the new pharma messages, recipients are presented with an e-mail that offers no subject line and no body text but instead contains an attached MPEG file with a random lowercase file name," Hines writes.

Click here to read the eWeek article.