The Seoul-based antivirus software developer Ahnlab says it analyzed a virus program that has sent floods of Internet traffic to paralyze major South Korean and U.S. Web sites over the past days.
Spokeswoman Hwang Mi-kyung says the company found that the virus will trigger a new attack in South Korea from 6 p.m. Thursday.
She says the new attack will target seven Web sites, including those of a government security agency, Kookmin Bank and the Chosun Ilbo newspaper.
South Korea's intelligence authorities suspect North Korea of spreading the virus program. Hwang says her company has not found where the cyber attacks originated.