Report: Computer hijacking on the rise

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Personal computers that play unwitting host to zombie code are proliferating at a startling pace, ZDNet UK reports.

Incidents involving the malicious code, also known as bot code, reached 13,000 from April through June, according to a report from antivirus-software maker McAfee.

That's quadruple the number tracked by the company in the previous three months. McAfee estimated that 63 percent more machines were exploited by bot programs and by spyware and adware ? their slightly less insidious, but more common, cousins ? in the first six months of this year than in the whole of last year.

Intruders can remotely control a network of infected machines to launch attacks on other computers and Web sites, spread spam and steal data, for example. Like most worms and viruses, zombie programs largely target machines running Windows.
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http://news.zdnet.co.uk/internet/security/0,39020375,39208661,00.htm