Apple has issued new updates to Java, Java for OS X 2012-003 and Java for Mac OS X 10.6 Update 8, to detect and remove the Flashback malware. In addition, this update will deactivate the Java browser plug-in, and Java Web Start, if they are unused for 35 days. It does not immediately deactivate Java in Safari, however, so if you do use Java applets on web sites, this will not affect your browsing.
If Apple’s Flashback removal tool does find that you are infected with one of the “most common variants of Flashback,” it will remove the malware, and display an alert. However, in Intego’s tests, this alert displayed very quickly, and disappeared almost immediately.