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Yahoo Infects Thousands of Users After Massive Malware Attack

YahooA malware attack hit Yahoo’s advertising server over the last few days, affecting thousands of users in various countries, an Internet security firm said. In a blog post, Fox-IT said Yahoo’s servers were releasing an “exploit kit” that exploited vulnerabilities in Java and installed malware. ”Clients visiting yahoo.com received advertisements served by ads.yahoo.com,” the internet security firm said. “Some of the advertisements are malicious.” Fox-IT, which is based in the Netherlands, focuses on cyber defense. It estimates tens of thousands of users were affected per hour. “Given a typical infection rate of 9%, this would result in around 27,000 infections every hour,” the company said. “Based on the same sample, the countries most affected by the exploit kit are Romania, Great Britain and France. At this time it’s unclear why those countries are most affected, it is likely due to the configuration of the malicious advertisements on Yahoo.” If a computer infected with malware is connected to a network, attackers can often access other connected systems and servers.

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More Stories By Shelly Palmer

Shelly Palmer is the host of NBC Universal’s Live Digital with Shelly Palmer, a weekly half-hour television show about living and working in a digital world. He is Fox 5′s (WNYW-TV New York) Tech Expert and the host of United Stations Radio Network’s, MediaBytes, a daily syndicated radio report that features insightful commentary and a unique insiders take on the biggest stories in technology, media, and entertainment.