Web Security: Analysis of Web security activity shows 30.5 percent of all web-based malware intercepted was new in May, a decrease of 5.8 percent since April. MessageLabs also identified an average of 1,311 new websites per day harboring malware and other potentially unwanted programs such as spyware and adware, an increase of approximately 100 per day compared with the previous month.

Spam: In May 2008, the global ratio of spam in email traffic from new and previously unknown bad sources, was 76.8 percent (1 in 1.30 emails), an increase of 3.3 percent on the previous month.

Viruses: The global ratio of email-borne viruses in email traffic from new and previously unknown bad sources, was 1 in 170.1 emails (0.59 percent) in May, an increase of 0.13 percent since the previous month.

Phishing: May saw a decrease of 0.11 percent in the proportion of phishing attacks compared with the previous month. One in 265.6 (0.38 percent) emails comprised some form of phishing attack. When judged as a proportion of all email-borne threats such as viruses and Trojans, the number of phishing emails rose by 23.4 percent to 64 percent of all email-borne malware threats intercepted in May.