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Botnets Behind Most Spam, Says MessageLabs

Posted by Kara Reeder Jun 30, 2009 10:36:02 AM

internentnews.com reports that, according to a report by Symantec's MessageLabs unit, botnets account for 83.2 percent of all spam. While the McColo shutdown severely affected the Srizbi botnet, shutting down the Pricewert ISP did little to curb Cutwail, the largest botnet around.

 

The reports also contained several other warnings:

 

  • E-mail malware attacks are increasingly being mounted against the health care IT sector.
  • Malware over IM is due to increase.
  • Image spam now makes up between 8 and 10 percent of spam.
  • Australia had the highest e-mail virus rate.

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