The widely-reported Boonana Trojan was a new piece of malware after all and had nothing directly to do with Koobface, Microsoft and other security companies have reported.

At the time, Mac security software company SecureMac reported Boonana as trojan.osx.boonana.a, later identified by Mac security specialist Intego and other companies as a variant of the Koobface worm that has been attacking Facebook users since 2008.

However, according to Microsoft, ESET and SecureMac, the similarity with Koobface doesn't appear to stretch beyond its general tactics and the fact that it attacks using Facebook and other social media sites. At a code level, what Microsoft now identifies as Trojan:Java/Boonana is a distinct piece of malware.

More: http://www.macworld.com/article/155560/