Yesterday, Apple disclosed for the first time that it is working to develop a software tool to detect and remove the Flashback malware from infected machines. We also previously profiled Flashback Checker, a simple app designed to allow users to easily see if their Macs are infected but which provides no assistance with disinfection.

While Apple works on its own official solution, other parties have continued to develop their own increasingly user-friendly tools for dealing with the threat and cleaning infected machines, with some of those tools making their way into the public’s hands.

Russian antivirus firm Kaspersky Lab, which has played a key role in monitoring and publicizing the threat of Flashback, yesterday announced the launch of a free web-based checker where users can simply input the hardware UUID of their Mac to see if it has registered on the firm’s servers as an infected machine. The company has also released Flashfake Removal Tool, a free app that quickly and easily detects and removes the malware.

Antivirus firm F-Secure has also announced its own free Flashback Removal app. The app generates a log file detailing whether it has found Flashback on a user’s system, and if so quarantines it inside an encrypted ZIP file for disposal.

F-Secure also points out that Apple has yet to offer any protection for users running systems earlier than Mac OS X Snow Leopard. Flashback uses a vulnerability in Java to install itself without user authorization, and Apple released software patches for Java on Lion and Snow Leopard last week to close that hole and prevent infection on updated systems. Machines running earlier versions of Mac OS X do, however, remain unprotected. Specifically, F-Secure notes that over 16% of Macs are still running Mac OS X 10.5 Leopard, marking a substantial user base that remains vulnerable to the threat.





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