Possible Widespread DNS Attack (info wanted)

Published: 2011-12-13
Last Updated: 2011-12-13 20:47:56 UTC
by Johannes Ullrich (Version: 1)
7 comment(s)

Thanks for the help with this! Turns out this had a not so malicious resolution for now: The IP address is used for numerous "spelling error" domains aka "typo squatting". The company/person behind this ip address is redirecting a large number of domains to the IP address which then displays a "yellow pages" look alike called "yellow book". Nothing malicious as far as I can tell for now, but some may not like this practice.


Alex wrote in a short time ago seeing "www.citrix.com" resolving to This IP address has been associated with malware in the past. Further investigation showed that literally hundreds of "brand name" sites point to this IP address (if you are using the "wrong" DNS server). For example, see the report from the BFK passive DNS caching tools:


Please let us know if you are seeing outbound traffic to this IP address or if you see DNS resolution requests that return this IP address. We are still investigating details.


Johannes B. Ullrich, Ph.D.
SANS Technology Institute

Keywords: dns
7 comment(s)



I just read this article and did a quick scan via Arcsight for the past 4 days on our network just to see if anything showed up as a "destination" to the ip address posted in this article.

Results are in and Total Events: 375
Firewall states: Dropped UDP DNS request from label length bytes exceeds remaining packet length Possible malware server?

I may have another IP for you which is

Please let us know more info as I will continue investigating.
Maybe not associated with DNS attacks, but this IP address appears to have more to "offer" than just a "yellow book".

For example, http://www.google.com/safebrowsing/diagnostic?site=AS:33626 mentions a number of hostnames associated with malware. Of those, the following currently resolve to sites-counter.com, phones4wow.com, a-n-d-the.com, livench.com, mydearmishima.com and mainnetsoll.com
(iphonecase.com, backyardbox.com and jiggythepom.com currently resolve to

See http://support.clean-mx.de/clean-mx/viruses.php?ip= for some malware URL's, or Google to: "" malware
Finally http://www.robtex.com/ip/ lists possibly more hostnames associated with (though not as many as bfk.de).
I ran a report in my web gateway for all web browsing to I have 410 URLs with a destination address of for the past 24 hours on my network. Let me know if you would like them.


Got a few hits on, in one case it seems to point to webexeurope.com
A few hundred http hits in the last 24 hours. In addition to the DNS lookups.
First time I noticed unusual number of wildcard queries was Mon Nov 28 13:00:00 2011. I made couple images out of reports that are available from DNS hosting partner that we are using.


The queries seem to come in bursts, and they also have day/night fluctuation. As I could not understand where these queries might be coming from I contacted DNS hosting partner. They said there is broken crawler somewhere in internet causing trouble for many domains. Perhaps this is related.
Domaintools = 1.5 million+ sites registered to this ip address [http://whois.domaintools.com/]

Robtex = 200+ registered to this ip address [http://www.robtex.com/ip/]

HostExploit.com =

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