Another tool called FlashBackChecker can check to see if your Mac is infected or not.
Russian firm Kaspersky Lab has released a free Mac antivirus tool to not only discover, but also delete Flashback from your Mac. Seeing a Russian company coming up with a cure for Flashback before Apple is strange because Flashback was created to target Mac which is manufactured by Apple.
A web tool has also been created by the guys at Kaspersky Lab to help potential Flashback victims:
Over the last few days our server has registered all the data sent by bots from the infected computers and recorded their UUIDs in a dedicated database. Based on this information we have set up an online resource where all users of Mac OS X can check if their computer has been infected by Flashback.
You can download Kaspersky’s Flashfake remove tool for free from their website. The antivirus tool creates a log file (RemoveFlashback.log) on your Mac’s desktop. If Flashback is found on your system, it will be quarantined into an encrypted .zip file and saved to your Home folder. The file will be encrypted with the password “infected.” You can send it to your Trash to get rid of Flashback once and for all.
If you are running the latest version of Mac OS X and if you have installed Apple’s last two Java patches, you should be safe from Flashback. Apple has not offered security updates for Mac users running a version of OS X older than Snow Leopard.
Source: Cult Of Mac