Two million U.S. PCs are part of botnets
A report compiled by Microsoft Corp. says there are 2.2 million personal computers in the United States that have been infected and are counted as part of botnets. Brazil has the second highest level of infections at 550,000, while 14.6 out of every 1,000 in South Korea are part of botnets.
Microsoft's 240-page report takes an in-depth analysis of botnets, and is intended to alert people and organizations to the growth and danger of malicious botnets. "Most people have this idea of a virus and how it used to announce itself," said Cliff Evans, head of security and identity at Microsoft UK. "Few people know about botnets."
Botnets are used to spew spam around the world, carrying out DDoS attacks on web services and sending phishing e-mails. Personal and private information can also be hoarded from infected machines and uploaded to locations for bot herders to retrieve and sell on in underground markets online.

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