We have received a pcap sample of DNS queries that display a strange behavior. The queries are type ANY for domains ghmn.ru and fkfkfkfa.com. When doing a nslookup, both domains have 100 IPs listed under their domain names with each of them resolving exactly the same last octets (i.e. .1, .10, .100, etc). Queries with the same transaction ID are often repeated several times. The traffic samples we have received indicate the queries are sent by either a host or a server.

If anyone else is seeing queries for either of these domains or queries with a similar behavior and can share some pcap or logs, you can submit them via our contact page.

Wireshark example of a query:

Update 1:

Domain fkfkfkfa.com

We have received logs that indicate this behavior has been ongoing as early as 23 Sep 2013.

Domain ghmn.ru

We have received logs that indicate this behavior has been ongoing as early as 15 Dec 2013.

[1] https://www.robtex.com/dns/ghmn.ru.html#shared
[2] https://www.robtex.com/dns/fkfkfkfa.com.html#shared

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Guy Bruneau IPSS Inc. gbruneau at isc dot sans dot edu