The number of Macs infected by the Flashback Trojan decreased from 600,000 to 142,000 in a week. During this time frame, Apple released a few Java patches and an uninstaller tool, in order to fight the most serious malware attack ever seen on the OS X.

According to a recent Symantec report, the OSX.Flashback.K threat remains active, despite the declining number of infected Macs. Apple released Java security updates to remove the most common variants of the Flashback malware.

Other vendors also offered solutions to Mac users, like Norton's free Flashback Detection and Removal Tool. Consequently, Flashback has been removed from over 460,000 Macs worldwide and the number of cured machines is increasing on a daily basis.

Nevertheless, for the Mac community there are still reasons to stay alert. Symantec points out that Mac users should be aware: Flashback variants don't just use the .com domains to infect OS X machines. The latest analysis revealed that .in, .info, .kz and .net domains are also risky.

In addition, the Oracle Java SE Remote Java Runtime Environment Denial Of Service Vulnerability (CVE-2012-0507, BID 52161) used to spread the Flashback Trojan is now used for distributing another Mac threat: OSX.Sabpab.

Source: Symantec