Glad you caught it
I'm too am hoping for a response from Avast
However no one program can possible remove all nasties
I'd do a double check
maybe an on demand on line scan with Kaspersky which is good at trojans and Bitdefender
you seem to know to google any hits
and to quarentene not just remove
maybe an antispyware scan
hope you are on high speed internet
Counterspy
or Spyware Doctor, Trojan Hunter
or
Super Anti Spy, Spybot Search and Destroy, A-Squared
watch for false positives
If NT based system check all users