More than 110,000 Facebook users accidentally installed malicious software over a recent two-day period, a security researcher says, allowing their computers to become infected with a dangerous porn-disguised Trojan that lets hackers take control. According to a warning sent out to the Full Disclosure mailing list last Thursday by the researcher, Mohammad Faghani, social networking users have been falling victim to the attack en masse by clicking on posts purported to contain pornographic material and then installing what appears to be an update to Flash Player, a popular Adobe-made piece of software used to view video footage within web browsers."The Trojan tags the infected user's friends in an enticing post," Faghani wrote. Upon opening the post, the user will get a preview of a porn video which eventually stops," he added. A prompt is then displayed, intended to persuade the target to install a phony Flash upgrade. Once a computer is infected, the researcher warned, a hacker is able to hijack the target's keyboard and mouse, effectively allowing an attacker to surreptitiously see every click and stroke being executed, as well as the contents of the computers.  more at url