Reminder of the Week

Post date: Oct 13, 2009 7:53:50 AM

Malware-carrying spam and attacks via Twitter and Facebook grew dramatically in the second half of 2009, says a report (PDF) released Tuesday by security company M86 Security.

The volume of spam shot up last year to more than 200 billion messages each day, or 80 percent to 90 percent of all inbound e-mail sent to organizations, said M86. Spam carrying malware also surged in the second half of the year, hitting 3 billion each day compared with 600 million per day in the first half of 2009.

The vast majority of spam is now sent through botnets hiding on infected computers--the second half of 2009 alone saw 78 percent of all spam triggered by the top five botnets, such as Rustock and Pushdo.