Since none of the Avast Moderators have responded and I know it is important to remove the malware from your machine, you have several choices:
1. Try going to the Geekstogo.com site:
http://www.geekstogo.com/forum/ - go to the Mac forum, register for assistance for malware removal from a malware removal specialist (not a lay person)
2. Contact first, then bring your machine into an Apple retail store for diagnostic testing and malware removal. They will keep your machine for at least 2 days for testing, and most likely if you do have malware on it have to scrub the HD. If this happens, you will lose everything on the machine and it will be restored to it's original factory condition. You can reinstall apps you purchased and update everything afterwards.
Unfortunately, most of the malware removal experts have been trained in Windows because Apple has felt that they were immune to malware. Times are changing and malware is spreading to Macs more and more, as you well know, and it will only get worse. I would suggest if you have not already done, to put security add-on's in your browser(s) - see my Signature as an example, and use Private sessions. Be careful where you surf on the web and always use an AV (preferably a resident).
If you have not turned on your Mac's internal firewall in Stealth mode, do it. You will most likely have to enter your Apple ID to do this, but it may help. In addition, if you use a router, make sure it is a
secured router.
Likewise, if you use flash on this machine, make sure you have the updated version once your machine is malware-free. Download the new version of flash on your machine but don't install it yet. You will want to make sure you remove previous versions of flash with the flash uninstaller (download it from the adobe site and put it on your desktop), then reboot. Next install the new verson of flash for Safari and other browsers while off-line, and select the prompt to remind you when a new update is available (do
not select automatic update), then reboot. Go to Apps. to verify what version you have installed. If you have any old versions there, delete them.
An app. to get rid of remnants of apps is AppCleaner (3rd party) - don't use this until your machine is malware-free. You can go on their web site to learn more about it and it's free. Basically instead of dragging an app to the trash bin, you drag it over the AppCleaner app on your desktop and it gets rid of EVERYTHING related to the app. It is much more effective than Apple's trash bin.
I wish I could be of more help. Let me know if you have any other questions. Thank you.
