Unusual IN ANY DNS Traffic
Douglas E. Warner
dwarner at ctinetworks.com
Tue May 10 15:22:16 UTC 2005
Since about 03:00 UTC this morning I've been seeing a huge increase in "IN
ANY" requests for "msn.com.". While my name servers have not seen much, if
any, "IN ANY" queries in the past, now I'm seeing ~ 50 queries/second. I'll
include a tcpdump sample below.
Actually, while I was writing this post the queries seem to have stopped
(15:05 UTC).
Is this typical of a botnet or some worm propogating? Any experience in this
type of traffic would be very much appreciated.
-Doug
==== tcpdump - times in EDT ====
# tcpdump -nn dst port 53 | grep 'ANY'
tcpdump: listening on eth0
10:27:16.748561 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 6+ ANY? msn.com. (25)
(DF)
10:27:16.751724 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 15+ ANY? msn.com. (25)
(DF)
10:27:16.758276 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 16+ ANY? msn.com. (25)
(DF)
10:27:16.758440 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 3+ ANY? msn.com. (25)
(DF)
10:27:16.758443 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 10+ ANY? msn.com. (25)
(DF)
10:27:16.759799 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 16+ ANY? msn.com. (25)
(DF)
10:27:16.761228 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 10+ ANY? msn.com. (25)
(DF)
10:27:16.762209 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 6+ ANY? msn.com. (25)
(DF)
10:27:16.764992 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 7+ ANY? msn.com. (25)
(DF)
10:27:16.765981 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 16+ ANY? msn.com. (25)
(DF)
10:27:16.766676 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 6+ ANY? msn.com. (25)
(DF)
10:27:16.766798 66.59.xxx.xxx.53 > 205.166.xxx.xxx.53: 8+ ANY? msn.com. (25)
(DF)
--
Douglas E. Warner <dwarner at ctinetworks.com> Network Engineer
CTI Networks, Inc. http://www.ctinetworks.com +1 717 975 9000
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