Twitter started suspending the accounts of some users whose computers have fallen victim to a malware “’Koobface,” which’s designed to spread itself by checking to see if person is logged into a social network. It’ll then post fraudulent messages on the person's Twitter account trying to entice friends to click the link, which then leads to a malicious Web site that tries to infect the PC. It has targeted other sites: Facebook, MySpace, Bebo, Hi5, Friendster and LiveJournal. Twitter is the latest site to be targeted by a Koobface variant, said Rik Ferguson of Trend Micro.
Source:→ PC World