Here we find avast’s side of the story as related by Deborah Salimi
how Vince Steckler’s (AVAST CEO) attentiveness saved avast’s day:
https://blog.avast.com/2013/10/09/attempted-hack-against-avast/
On Passive DNS Hardening read: https://archive.farsightsecurity.com/Passive_DNS/passive_dns_hardening_handout.pdf
article author = Robert Edmonds, Internet Systems Consortium, Inc.
polonus