New Apple Mac Trojan Called OSX/Crisis Discovered
Intego has discovered a new Trojan, called OSX/Crisis. This threat works only in OSX versions 10.6 and 10.7 – Snow Leopard and Lion. It installs without need of any user interaction; no password is required for it to run. The Trojan preserves itself against reboots, so it will continue to run until it’s removed.
http://www.intego.com/mac-security-blog/new-apple-mac-trojan-called-osxcrisis-discovered-by-intego-virus-team/