eWeek: Some of the major organizations still have not removed the DNSChanger Trojan from infected computers, despite the fact that the botnet's command-and-control infrastructure has been under the Federal Bureau of Investigation's control for the past few months.

The primary function of the DNSChanger malware family is to replace the Domain Name System servers defined on the victim's computer with rogue ones operated by the criminals. DNS translates domain names into the numeric IP addresses and lets users access Websites and work online without having to know each specific computer's address. Windows and Mac OS X users are both vulnerable to this Trojan.

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