Storm Worm

The Storm Worm (dubbed so by the Finnish company F-Secure) is a phishing backdoor Trojan horse that affects computers using Microsoft operating systems, discovered on January 17, 2007. The worm is also known as:

The Storm Worm began attacking thousands of (mostly private) computers in Europe and the United States on Friday, January 19, 2007, using an e-mail message with a subject line about a recent weather disaster, "230 dead as storm batters Europe". During the weekend there were six subsequent waves of the attack. As of January 22, 2007, the Storm Worm accounted for 8% of all malware infections globally.

There is evidence, according to PCWorld, that the Storm Worm was of Russian origin, possibly traceable to the Russian Business Network.