The Flashback Trojan is the culprit here, but is nothing new. The Trojan first appeared disguised as a Flash installer last September, and disabled Mac OS Xs built in malware protections. This version makes its way into Macs through a Java vulnerability, and is loaded onto unpatched Macs without interaction from the user. Apple on Tuesday released Java for OS X 2012-001. It is available via Software Update and also via standalone installers for Mac 10.6 Snow Leopard and OS X 10.7 Lion.”]