Avast 4.6 Pro lacks of item in its database

Dear Experts,

As I am using Avast 4.6 Pro and together with Ewido Security Suite 3.5 in WinXP, I see that Ewido Security Suite is smarter than Avast. Ewido can find the following trojan so fast. Here is the file according to the information from Ewido:
Name : ogaa.dll
Location : C: windows/system32
Description : Trojan downloader. Small azk

I hope experts of Avast more creative to find trojan or worm that spread out in world’s network. And please consider this information is one of inputs for you all.

Thank you.
Dalum ;D

Can you send an email with the file (false positive or infected) to: virus@avast.com
You can zip and password the files… Inform a link to this thread and the password used.
You can send the files to Chest and, from there, resend to Alwil for analysis.
Thanks 8)