He said that data from Microsoft and other security researchers "indicate that our actions have effectively decimated communications within the Waledac bot network." An analysis by the Shadowserver Foundation of honeypot PCs (machines allowed to be infected by researchers to observe their behavior) showed that commands received by the infected machines plummeted.
Additionally, the "honeypot" machines are no longer spewing spam. A firm called Sudosecure has also witnessed a sharp decline in the number of new IP addresses joining the Waledac network.
Waledac is responsible for millions upon millions of spam messages being spread across the Internet. Between December 3 and December 21, Hotmail caught 651 million spam e-mails from the Waledac network destined for users' accounts.