apple is also released Flashback malware removal tool
you can download it from http://support.apple.com/downloads/
official relase notes
About Flashback malware removal tool
This update removes the most common variants of the Flashback malware. This update contains the same malware removal tool as Java for OS X 2012-003.
If the Flashback malware is found, a dialog will be presented notifying the user that malware was removed.
In some cases, the Flashback malware removal tool may need to restart your computer in order to completely remove the Flashback malware.
This update is recommended for all OS X Lion users without Java installed. “