One bot-infected PC = 600,000 spam messages a day

Some bot-infected PCs can crank out as many as 25,000 spam messages per hour, new research released today claimed.Orange, Calif.-based Marshal8e6 deliberately infected machines in the lab of its research arm, TRACElabs, with the malware responsible for the world’s nine biggest spam botnets, then observed the PCs’ behavior, including each bot’s top-end spam capacity.
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http://computerworld.com.au/article/300411/