internet security tHreAt rePOrt GOVernMent 2013

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p. 42 Symantec Corporation Internet Security Threat Report <strong>2013</strong> :: Volume 18 MaLWaRE, SPaM, aNd PhIShINg data Spam Spam rates declined for a second year in a row, dropping from 75 percent in 2011 to 69 percent of all email in 2012. In 2011 we were reluctant to call this decrease in spam a permanent trend. Botnets can be rebuilt, new ones created. But several factors appear to be keeping spam rates lower than in previous years. The takedowns of spam botnets continued in 2012. In March 2012 a resurrected Kelihos botnet was taken down for a second time. In July the Grum botnet was taken down. While both were significant spam botnets and contributed to the reduction in spam, undoubtedly email spammers are still feeling the pain of botnet takedowns from 2011. Additionally, pharmaceutical spam continues to decline, apparently unable to recover from the loss of the major players in the online pharmaceutical business. 30 Given advancements in anti-spam technology, plus the migration of many users to social networks as a means of communication, spammers may be diversifying in order to stay in business. This is not to say that the problem of spam has been solved. At 69 percent of all email, it still represents a significant amount of unwanted messages. As email spam rates continue to decline, we see the same social engineering techniques that have been used in email spam campaigns increasingly being adopted in spam campaigns and being promoted through social networking channels. Top 5 activity for Spam destination by geography Country % saudi Arabia 79% Bulgaria 76% chile 74% Hungary 74% china 73% Top 5 activity for Spam destination by Industry Industry % Marketing/Media 69% Manufacturing 69% recreation 69% Agriculture 69% chemical/Pharmaceutical 69% Top 5 activity for Spam destination by Company Size Organization Size % 1-250 68% 251-500 68% 501-1,000 68% 1,001-1,500 69% 1,501-2,500 69% 2,501+ 68%
p. 43 Symantec Corporation Internet Security Threat Report <strong>2013</strong> :: Volume 18 MaLWaRE, SPaM, aNd PhIShINg global Spam Volume Per day in 2012 Source: Symantec 60 50 40 30 20 10 global Spam Rate – 2012 vs 2011 Source: Symantec 90% 80 70 60 50 40 30 20 10 0 JAN JAN BILLIONS FEB FEB MAR MAR APR APR MAY MAY JUN JUN JUL JUL AUG AUG SEP SEP OCT OCT NOV NOV DEC DEC 2011 2012 • Spam volumes were highest in August. • The estimated projection of global spam volumes decreased by 29 percent, from 42 billion spam emails per day in 2011, to 30 billion in 2012. The overall average global spam rate for 2012 was 69 percent, compared with 75 percent in 2011.
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