Spam, malware, and phishing occurrence
Spam levels in February 2012 were 61.2% below the value from February 2011, thus putting them at approximately the same level as immediately after the Rustock shutdown. Spam volumes temporarily increased in the fourth quarter of 2011, but then collapsed again just as quickly. By contrast, the number of dangerous e-mails has increased significantly. Malware e-mails increased by 50.5% since February 2011 and virus outbreaks more than doubled (107.0%).
Phishing e-mails saw the largest jump, increasing by 145.0% between February