A New Mac.BackDoor.iWorm Threat discovered by Doctor Web Has Infected Over 18,500 Macs read more here http://iClarified.com/44390 via @iClarified

To check if you are infected, simply navigate to the /Library/Application Support/JavaW directory. If it exists you are likely infected.

To do this open a new Finder window. Press the Comment + Shift + G keys at the same time. Input /Library/Application Support/JavaW into the textfield and click Go. If your computer is clean you should get a This folder can’t be found message.