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An attacker could infect more than 4 million computers around the world with malware.

According to the Associated Press, a hacker from Estonia was extradited to the United States. Note that the U.S. authorities charged with Anton Ivanov, the infection of computer systems with malware, which is passed queries to advertisements.

In the U.S., Ivanov appeared before a federal court in Manhattan. The attacker has pleaded not guilty. Fraudulent activity carried Ivanov, five other hackers from Estonia and one from Russia. The charges were brought against attackers in November 2011. Prosecutors claim that hackers are not only used the malware to redirect search requests to advertisements, but replaced the ads on sites that are visited by users. Attackers also blocked the installation of antivirus software on the computers of victims. According to the FBI, the fraudulent activities in the period from 2007 to 2011 allowed the attackers to earn $ 14 million hackers managed to infect more than 4 million computers in 100 countries around the world. 500 infected PCs owned by customers from the United States, including the space agency NASA.