A different approach.
This one seems slightly different from all the packed viruses I'm seeing of late and thought you gurus might be interested.
Bot no doubt but still a little different from most you see in the originating email address and the to email address.
I won't bother with the kav bit, but hey, they will try anything. :)
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From: "=?gb2312?B?bm9yd2VnaWFu?=" <email@example.com>
To: "=?gb2312?B?bm9yd2VnaWFu?=" <XXXXX@westnet.com.au>,
Date: Thu, 13 Dec 2012 19:48:33 +0800
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The only thing necessary for the triumph of evil is for good men to do nothing - Edmund Burke