The Deadly Duo: Spam and Viruses
A flood of new viruses were introduced in November, yet the top players in the space mostly held positions reached last month.
Almost 40 new viruses surfaced in November, many appearing within eight hours of each other. Commtouch identified 29 percent of the attacks to be "low intensity;" 47 percent "medium intensity;" and 24 percent "high" to "very high." Many of the new viruses (53 percent) were part of what the firm called "multi-wave" attacks. Such attacks happen when virus propagators introduce variants within hours of the initial distribution of a virus to thwart updates to anti-virus software definitions. In one case, eight variants were released within 14 hours. Forty-seven percent of new viruses in November were sent as "one-off" attacks. The Deadly Duo: Spam and Viruses, November 2005
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