Half of Fortune 500s, US Govt. Still Infected with DNSChanger Trojan — Krebs on Security

The malware, known as the “DNSChanger Trojan,” quietly alters the host computer’s Internet settings to hijack search results and to block victims from visiting security sites that might help scrub the infections. DNSChanger frequently was bundled with other types of malware, meaning that systems infected with the Trojan often also host other, more nefarious digital parasites.

In early November, authorities in Estonia arrested six men suspected of using the Trojan to control more than four million computers in over 100 countries — including an estimated 500,000 in the United States. Investigators timed the arrests with a coordinated attack on the malware’s infrastructure. The two-pronged attack was intended to prevent miscreants from continuing to control the network of hacked PCs, and to give Internet service providers an opportunity to alert customers with infected machines.

via krebsonsecurity.com