According to a report from Sunbelt Software, Trojan attacks were the leading online threat during the month of December 2009.

"Trojans specifically accounted for some 18.7 percent of all attacks in the final month of the calendar year," writes eWeek's Matthew Hines. "As they have for years now, the attacks that disguise themselves as legitimate files or programs remain the primary method that attackers are attempting to use to dupe people a sign that the technique must still be finding plenty of victims."

"The fact [that] the Trojan categorization covers so many different types of attacks, from botnets to e-banking spyware, also helps contribute to the fact that the technique remains so pervasive," Hines writes.

Click here to read the eWeek story.