Weekly spam summary on January 27th, 2007
This week, we:
- got 14,755 messages from 268 different IP addresses.
- handled 23,910 sessions from 1,483 different IP addresses.
- received 248,718 connections from at least 75,622 different IP addresses.
- hit a highwater of 37 connections being checked at once.
Volume seems noticeably up compared to last week. The apparent jump in the number of different IP addresses trying to talk to us concerns me, since it is probably yet another indication of the growing zombie armies.
About all I can say about this table is that I can remember when 20,000 connections a day was the ordinary baseline. Hopefully it'll go back there someday.
Kernel level packet filtering top ten:
Host/Mask Packets Bytes 18.104.22.168/24 15081 680K 22.214.171.124 13873 712K 126.96.36.199/24 12301 734K 188.8.131.52 8435 505K 184.108.40.206 6534 392K 220.127.116.11 5745 292K 18.104.22.168 5059 270K 22.214.171.124 4544 212K 126.96.36.199 4412 212K 188.8.131.52 3188 149K
I'd call this about the same as last week.
- 184.108.40.206 and 220.127.116.11 return from last week.
- 18.104.22.168 is a Japanese IP address without valid reverse DNS.
- 22.214.171.124 is a bigpond.net.au cablemodem that has appeared here before.
- 126.96.36.199 is a telecomitalia.it machine reappearing from December.
- 188.8.131.52 and 184.108.40.206 were blocked for repeated bad
- 220.127.116.11 is in the SORBS DUL.
In general, a broad variety of the usual suspects.
Connection time rejection stats:
63406 total 40314 dynamic IP 15167 bad or no reverse DNS 4941 class bl-cbl 1475 class bl-sbl 281 class bl-dsbl 210 class bl-njabl 124 class bl-pbl 106 class bl-sdul
This is up significantly this week compared to last week, and the CBL and the SBL appear to have caught on fire. Such a huge SBL presence deserves a breakdown:
|1291||SBL50451||18.104.22.168/24, listed as a spam source and spam website hoster (25-Jan-2007)|
|137||SBL43664||22.214.171.124/23, aka 'GO TECH HOSTING', listed as a spam source and more (18-Oct-2006)|
|16||SBL50430 plus SBL50333||wanadoo.co.uk's main mail machines, listed for advance fee fraud (24-Jan-2007)|
|10||SBL50325||sify.net webmail, listed for advance fee fraud (22-Jan-2007)|
|10||SBL50181||advance fee fraud spam source (18-Jan-2007, but active since November, and tried to hit us last week too)|
|10||SBL50211||126.96.36.199, also a carryover from last week, but now apparently removed from the SBL.|
SBL50451 managed to connect to us a few times before it got SBL listed, but it looks like it didn't manage to deliver anything because the messages it was trying to send had URLs that tripped some of our other spam filtering.
Only two of the top 30 most rejected IP addresses were rejected 100
times or more this week, but the leader is a real champion; 188.8.131.52
was rejected 2,546 times due to it being a wanadoo.fr dialup, and
184.108.40.206 was rejected 100 times due to being a Mexican IP address
without working reverse DNS (it's also on the CBL et al). In other
news, 14 of the top 30 are currently in the CBL, 9 are currently
bl.spamcop.net, and two are in the SBL.
The SBL-listed two are 220.127.116.11, part of SBL41018, a /20 Pacnet escalation listing from 24-Dec for spammer hosting that we saw before in December, and 18.104.22.168, SBL37424, a /26 ROKSO listing from 19-Oct for Richard Simnett aka S-Infotech and Direct Media Network. As usual, neither were actually rejected for being SBL-listed; the Pacnet IP was blocked for bad reverse DNS, and the Simnett IP was blocked because we have that /24 blocked as an old spam source.
This week Hotmail brought us:
- 2 messages accepted.
- no messages rejected because they came from non-Hotmail email addresses.
- 29 messages sent to our spamtraps.
- no messages refused because their sender addresses had already hit our spamtraps.
- 1 message refused due to its origin IP address being from saix.net of South Africa.
And the final numbers:
|what||# this week||(distinct IPs)||# last week||(distinct IPs)|
This is an improvement from last week, but not a great one. There's
no clear winner of the bad
HELO sweepstakes, just a bunch of people
with middle double-digit rejection counts.
The clear champion of bad bounces is 22.214.171.124, with 64, all to
the username '
erqxsdtlqele'. In terms of general sources, Germany
and Italy fought it out this week, with contributions from Russia
and various other places around the world. Random alphabetic jumble
usernames continued their overall domination of the bad bounce targets,
but this week saw some ones with leading numbers show up, along with a
number of more plausible usernames. Bad bounces were sent to only 148
different bad usernames this week.