Tag Archives: recidivist

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

AS 122 U-PGH-NET-AS 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

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Pittsburgh back in the top 10 for spam from U.S. medical organizations

And this time it's #1 in the July 2012 U.S. SpamRankings.net from CBL data:

AS 122 U-PGH-NET-AS in the same ranking over time:

Apr May Jun Jul Aug Sep Oct Nov Dec 2012
Feb Mar Apr May Jun Jul
34 32 32 8 31 8 4 29 32 33 30 32 29 6 5 9 1

University of Pittsburgh Medical Center's AS 122 U-PGH-NET-AS and Erie County Medical Center's AS 17311 ECMC-BGP not only took #1 and #2, they also spammed longer than other medical ASNs. That jumped them up 8 ranks each in one month.


Microsoft back on top in June SpamRankings.net

2 (1) AS 36692 OPENDNS
3 (-) AS 26769 BANDCON
4 (-) AS 22414 CRAIGS-NET-1
5 (-) AS 22822 LLNW
6 (-) AS 10912 INTERNAP-BLK

Beating even OPENDNS, Microsoft took #1 in U.S. PSBL June 2012 rankings.

Microsoft was last on top in the same rankings for April 2012. I thought Microsoft was a leader in Internet security?

In other news, Bell Canada’s AS 577 BACOM actually dropping off the Canadian June 2012 rankings from CBL data. Shaw took #1 and Iweb dropped to #2.

We have a new medical winner! It’s Hartford Hospital’s AS 11047 HHCC-ASN1. Gaining altitude at the end of the month was Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University with AS 20252 JSIWMC.

More on those and other developments in later blog posts.