From Wired News:
Botnet criminals have taken control of almost 12 million new IP addresses since January, according to a quarterly report (.pdf) from anti-virus firm, McAfee. The United States has the largest number of botnet-controlled machines, with 18 percent of them based here.
The number of zombie machines represents a 50-percent rise over last year.
Researchers attribute the explosion to botnet controllers trying to recoup spamming abilities after authorities took down a hosting facility last year that catered to international firms and syndicates involved in spamming and botnet control.
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