Festi botnet in July 2012 U.S. Medical SpamRankings.net from CBL

The curve that took University of Pittsburgh Medical Center's AS 122 U-PGH-NET-AS to number one in the July 2012 U.S. SpamRankings.net from CBL data is almost completely explained by Festi botnet, except for one day, plus the small curve at the beginning of the month was apparently caused by Grum botnet.

AS 17311 ECMC-BGP was infested with Festi (blue curve on the right) at the same time as AS 122, and AS 17311 earlier had a Cutwail botnet