IM attacks up 25% in April 2006

According to Postini, the sheer volume of instant messaging threats it tracked during April 2006 increased by nearly 25%, compared with the number of similar threats it detected during March 2006. 90% of the of IM-related security attacks Postini observed during 2005 included worm propagation, while 9% delivered viruses and only 1% of the threats utilized known client vulnerabilities or exploits.