Avast says it has found it, but I can’t find any info about what it is.
well the best virus info is usually found at microsoft or kaspersky, but then you need to know what name they are using on it, and there is no naming standard among the AV vendors
so if you can upoad the sample to Virustotal and see wht the other AV vendors that detect it call it and then search…
General info
http://en.wikipedia.org/wiki/Dropper
http://www.ehow.com/about_5449049_malware-dropper.html