Researchers: Attacks on U.S., Korea sites came from U.K.

Elinor Mills
CNet NEws
Wednesday, July 15, 2009

The denial-of-service attacks launched on Web sites in South Korea and the United States earlier this month appear to have come from a master server in the United Kingdom, according to security researchers in Vietnam.

The master server controls all of the eight command and control servers involved in the series of distributed denial-of-service attacks that started on the July 4 weekend, security firm Bkis said in a blog posting on its Web site on Monday. Bkis said it gained control of two of the servers.

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The Vietnamese firm estimated the number of compromised PCs involved in the attacks to be around 167,000 in 74 countries.

Botnet expert Joe Stewart of SecureWorks told CNET News that that number sounded high. Security experts had been estimating that there were 50,000 infected PCs in the botnet.

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