Botnet Statistics [2012-03-31]

I rebuilt a greylisting vps yesterday, so expect the statistics get back to its normal level.

detection period: 2012-03-31 00:00-23:59 UTC
total number of suspected botnet IPs: 2215
number of botnet IPs notified to network operators: 1702
number of spam blocked: 177515
recipient count of spam blocked: 6155203

The top 10 networks (as found in WHOIS), ordered by number of suspected botnet IPs are:

Rank	Network	# of suspected botnet IPs
1	HINET-NET	454
2	UNICOM-GD	224
3	MAINT-CHINANET-HA	71
4	CHINANET-GD	54
5	PHN-67-221-46-0-23	41
6	UNICOM-BJ	25
7	PTCL	24
8	CHINANET-FJ	24
9	CHINANET-JS	21
10	033.530.486/0001-29	18

The top 10 countries (as defined by the 2-character country code), ordered by number of suspected botnet IPs are:

Rank	Country	# of suspected botnet IPs
1	China	660
2	Taiwan	470
3	United States	191
4	Brazil	114
5	Russian Federation	59
6	India	46
7	South Korea	39
8	Poland	35
9	Pakistan	32
10	Indonesia	32