85 Percent of Spam Traced to Six Botnets

March 10th, 2008 |

ATLANTA – Security company Marshal has estimated that six botnets are responsible for 85 percent of the world’s spam.
The spambot trojan Srizbi accounts for 39 percent of global spam, followed by Rustock at 20 percent, Mega-D at 11 percent, Hacktool.Spammer at 7 percent, Pushdo at 6 percent and Storm at 2 percent.
The numbers track the quantity of spam produced by each botnet, not the total number of systems infected.
The profile of Mega-D, which ARS Technica said in early February was swiftly rising through attack methods based on social engineering, is dropping because of a 10-day control server malfunction. Mega-D’s attack uses mirrors of social website emails and actual Flash animations, which are offered after users install a “Flash update.”
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85 Percent of Spam Traced to Six Botnets

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