SecureMac says that “there have been reports of similar behavior in recent trojan horses targeting Microsoft Windows, but they have not included cross-platform capabilities until now.” SecureMac also has a writeup on what appears to be the same threat, which it calls. It spreads by posting messages on Facebook, MySpace and Twitter, usually trying to get people to click a link to view some sort of video.” Intego notes that if the download is allowed, “it runs a local web server and an IRC server, acts as part of a botnet, acts as a DNS changer, and can activate a number of other functions, either through files initially installed or other files downloaded subsequently. According to Intego, the applet includes a prompt to install the malicious software: Security software maker Intego says this Mac OS X version of the Koobface worm is being served as part of a multi-platform attack that uses a malicious Java applet to attack users. A new version of the infamous Koobface worm designed to attack Mac OS X computers is spreading through Facebook and other social networking sites, security experts warn.
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