isprime DOS in progress

Chris McDonald copraphage at gmail.com
Fri Jan 23 15:21:52 CST 2009


We [AS3491] null0'd the IP earlier.  Rest-of-world encouraged to do the same :/






On Fri, Jan 23, 2009 at 3:20 PM, Luke Sheldrick <luke at sheldrick.co.uk> wrote:
>
> Looks to me like the target has moved, anyone else seeing similar?
>
> Jan 23 20:19:08 LND02 named[9611]: client 63.217.28.226#39489: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:09 LND02 named[9611]: client 63.217.28.226#20558: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:11 LND02 named[9611]: client 63.217.28.226#38525: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:12 LND02 named[9611]: client 63.217.28.226#41535: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:12 LND02 named[9611]: client 63.217.28.226#51220: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:13 LND02 named[9611]: client 63.217.28.226#28869: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:14 LND02 named[9611]: client 63.217.28.226#12337: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:15 LND02 named[9611]: client 63.217.28.226#41346: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:15 LND02 named[9611]: client 63.217.28.226#56831: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:17 LND02 named[9611]: client 63.217.28.226#13352: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:18 LND02 named[9611]: client 63.217.28.226#55466: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:18 LND02 named[9611]: client 63.217.28.226#24586: view
> external: query (cache) './NS/IN' denied
> Jan 23 20:19:19 LND02 named[9611]: client 63.217.28.226#43105: view
> external: query (cache) './NS/IN' denied
>
>
>
> On Fri, 2009-01-23 at 19:46 +0000, Steven Lisson wrote:
> > Hi,
> >
> > I agree with seeing no traffic to/from 66.230.128.15 but am still seeing flows 'from' 66.230.160.1
> >
> > Regards,
> > Steve
> >
> > -----Original Message-----
> > From: Phil Rosenthal [mailto:pr at isprime.com]
> > Sent: Saturday, 24 January 2009 4:12 AM
> > To: nanog at nanog.org
> > Subject: Re: isprime DOS in progress
> >
> > Just a friendly notice, the attack against 66.230.128.15/66.230.160.1
> > seems to have stopped for now.
> >
> > -Phil
> > On Jan 22, 2009, at 6:01 AM, Bjørn Mork wrote:
> >
> > > Graeme Fowler <graeme at graemef.net> writes:
> > >
> > >> I've been seeing a lot of noise from the latter two addresses after
> > >> switching on query logging (and finishing an application of Team
> > >> Cymru's
> > >> excellent template) so I decided to DROP traffic from the addresses
> > >> (with source port != 53) at the hosts in question.
> > >>
> > >> Well, blow me down if they didn't completely stop talking to me. Four
> > >> dropped packets each, and they've gone away.
> > >>
> > >> Something smells "not quite right" here - if the traffic is
> > >> spoofed, and
> > >> my "Refused" responses have been flying right back to the *real* IP
> > >> addresses, how are the spoofing hosts to know that I'm dropping the
> > >> traffic?
> > >
> > > Did you filter *only* 66.230.128.15/66.230.160.1, or are you dropping
> > > traffic from other sources too?  Looks like some of the other source
> > > addresses are controlled by the DOSers. Possibly used to detect
> > > filters?
> > >
> > > These clients may look similar to the DOS attack, but there are subtle
> > > differences:
> > >
> > > Jan 18 05:08:33 canardo named[32046]: client 211.72.249.201#29656:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 05:08:33 canardo named[32046]: client 211.72.249.201#29656:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 05:08:34 canardo named[32046]: client 211.72.249.201#29656:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 05:47:00 canardo named[32046]: client 211.72.249.201#29662:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 05:47:01 canardo named[32046]: client 211.72.249.201#29662:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 05:47:01 canardo named[32046]: client 211.72.249.201#29662:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 06:25:22 canardo named[32046]: client 211.72.249.201#29664:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 06:25:22 canardo named[32046]: client 211.72.249.201#29664:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 06:25:23 canardo named[32046]: client 211.72.249.201#29664:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 07:03:41 canardo named[32046]: client 211.72.249.201#29667:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 07:03:41 canardo named[32046]: client 211.72.249.201#29667:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 07:03:42 canardo named[32046]: client 211.72.249.201#29667:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 07:42:08 canardo named[32046]: client 211.72.249.201#29670:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 07:42:09 canardo named[32046]: client 211.72.249.201#29670:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 07:42:09 canardo named[32046]: client 211.72.249.201#29670:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 08:20:29 canardo named[32046]: client 211.72.249.201#29673:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 08:20:29 canardo named[32046]: client 211.72.249.201#29673:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 08:20:30 canardo named[32046]: client 211.72.249.201#29673:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 08:58:50 canardo named[32046]: client 211.72.249.201#29678:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 08:58:51 canardo named[32046]: client 211.72.249.201#29678:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 08:58:51 canardo named[32046]: client 211.72.249.201#29678:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 09:37:12 canardo named[32046]: client 211.72.249.201#29679:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 09:37:12 canardo named[32046]: client 211.72.249.201#29679:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 18 09:37:13 canardo named[32046]: client 211.72.249.201#29679:
> > > view external: query (cache) './NS/IN' denied
> > >
> > > Jan 20 07:02:51 canardo named[32046]: client 213.61.92.192#46716:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 07:02:51 canardo named[32046]: client 213.61.92.192#46716:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 07:02:51 canardo named[32046]: client 213.61.92.192#46716:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 07:41:21 canardo named[32046]: client 213.61.92.192#46752:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 07:41:21 canardo named[32046]: client 213.61.92.192#46752:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 07:41:21 canardo named[32046]: client 213.61.92.192#46752:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 08:19:46 canardo named[32046]: client 213.61.92.192#46785:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 08:19:46 canardo named[32046]: client 213.61.92.192#46785:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 08:19:46 canardo named[32046]: client 213.61.92.192#46785:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 08:58:12 canardo named[32046]: client 213.61.92.192#46808:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 08:58:12 canardo named[32046]: client 213.61.92.192#46808:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 08:58:12 canardo named[32046]: client 213.61.92.192#46808:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 09:36:34 canardo named[32046]: client 213.61.92.192#46833:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 09:36:34 canardo named[32046]: client 213.61.92.192#46833:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 09:36:34 canardo named[32046]: client 213.61.92.192#46833:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 10:14:58 canardo named[32046]: client 213.61.92.192#46858:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 10:14:58 canardo named[32046]: client 213.61.92.192#46858:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 20 10:14:58 canardo named[32046]: client 213.61.92.192#46858:
> > > view external: query (cache) './NS/IN' denied
> > >
> > > Jan 22 06:27:28 canardo named[32046]: client 66.238.93.161#34373:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 06:27:28 canardo named[32046]: client 66.238.93.161#34373:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 06:27:28 canardo named[32046]: client 66.238.93.161#34373:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 07:05:55 canardo named[32046]: client 66.238.93.161#34420:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 07:05:55 canardo named[32046]: client 66.238.93.161#34420:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 07:05:55 canardo named[32046]: client 66.238.93.161#34420:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 07:44:20 canardo named[32046]: client 66.238.93.161#34473:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 07:44:20 canardo named[32046]: client 66.238.93.161#34473:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 07:44:21 canardo named[32046]: client 66.238.93.161#34473:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 08:22:38 canardo named[32046]: client 66.238.93.161#34503:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 08:22:38 canardo named[32046]: client 66.238.93.161#34503:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 08:22:38 canardo named[32046]: client 66.238.93.161#34503:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 09:00:56 canardo named[32046]: client 66.238.93.161#34540:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 09:00:56 canardo named[32046]: client 66.238.93.161#34540:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 09:00:56 canardo named[32046]: client 66.238.93.161#34540:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 09:39:20 canardo named[32046]: client 66.238.93.161#34574:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 09:39:21 canardo named[32046]: client 66.238.93.161#34574:
> > > view external: query (cache) './NS/IN' denied
> > > Jan 22 09:39:21 canardo named[32046]: client 66.238.93.161#34574:
> > > view external: query (cache) './NS/IN' denied
> > >
> > >
> > > Notice the pattern:
> > > 3 probes every 38 minutes
> > > Each probe from the same source port
> > > Source port increases slowly and steadily
> > >
> > > This looks like some application actually waiting for a response.  The
> > > slow source port change is probably an indication that this client
> > > only
> > > tests a small number of DNS servers.  I guess that this client is
> > > either
> > > one of the many bots used to send the spoofed requests, or maybe a bot
> > > not allowed to spoof its source and therefore used for other
> > > purposes. In any case, I assume that other DNS servers may see such
> > > control sessions coming from other addresses.
> > >
> > > These 3 clients started probing my DNS server almost simultaneously
> > > on January 8th:
> > >
> > >
> > > Jan  8 19:33:52 canardo named[26496]: client 213.61.92.192#31195:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:33:52 canardo named[26496]: client 213.61.92.192#31195:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:33:52 canardo named[26496]: client 213.61.92.192#31195:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:36:29 canardo named[26496]: client 66.238.93.161#11299:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:36:29 canardo named[26496]: client 66.238.93.161#11299:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:36:30 canardo named[26496]: client 66.238.93.161#11299:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:37:47 canardo named[26496]: client 211.72.249.201#29112:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:37:47 canardo named[26496]: client 211.72.249.201#29112:
> > > view external: query (cache) './NS/IN' denied
> > > Jan  8 19:37:47 canardo named[26496]: client 211.72.249.201#29112:
> > > view external: query (cache) './NS/IN' denied
> > >
> > > Maybe preparing for the attack on ISPrime?  I didn't start receiving
> > > spoofed requests from 66.230.128.15/66.230.160.1 before January 20th
> > >
> > >
> > > I just tried filtering the probing addresses.  This made the probing
> > > stop immediately after dropping a set of 3 probes.  But the spoofed
> > > requests continuted at the same rate as before, so this does not
> > > support
> > > my theory.
> > >
> > > However, I believe it would be too much of a coincidence if there
> > > isn't
> > > some connection between the probing and the DOS attack.  It would be
> > > interesting to hear if others see similar probing.
> > >
> > >
> > >
> > > Bjørn
> > >
> >
> >
> >
>
>




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