More private computers were commandeered by hackers for malicious purposes in China in the last quarter of 2009 than in any other country, according to a new study by an Internet security company.
These “zombie” computers are often grouped into “botnets,” or armies of infected computers that can be used to send spam e-mail or attack websites, according to McAfee, a Silicon Valley security firm. The company, which said it collects information about Internet-based threats that target more than 100 million computers in 120 countries, said that in the last three months of 2009, about 1,095,000 computers in China were infected and 1,057,000 in the United States.
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