swedish dns zone enumerator

Thu Nov 2 18:15:40 UTC 2023

On 02/11/2023 05:15, Randy Bush wrote:
> ya, right,  and at a whole bunch of other cctld servers
> 
> from a network called domaincrawler-hosting
> 
It looks like a list based attempt to discover domain names registered 
in some small ccTLDs. The problem with some of the queries is that a few 
of the second level subdomains of those ccTLDs have just hundreds of 
registrations. Not sure if it is an DNSSEC based attack.

Unlike the gTLDs, available via the ICANN CZDS, most ccTLDs don't 
provide access to their zone files. Some of the queries are odd because 
it seems to be applying lists from Swedish or German language sources to 
small ccTLDs where the main languages of the countries are not Swedish 
or German. Some of those domain name strings don't exist in the gTLDs. A 
few of the examples don't exist in the .SE or .DE ccTLDs either.

The ccTLDs become more "unique" when the main language of their country 
is not English. As a ccTLD's market evolves, registrants will often 
decide to only register in their ccTLD rather than in .COM or other 
gTLDs. The percentage of these unique registrations, as opposed to 
registrations having an equivalent in the gTLDs, can be upwards of 15%. 
The percentage is also affected by economic conditions in the ccTLD's 
market and the price of a ccTLD registration compared to a .COM 
registration. The problems for a list based dns enumeration on these 
small ccTLDs are that there is a lot of them and they are small.

It might be an idea to contact Domaincrawler(.)com and ask what it is 
doing.

Regards...jmcc
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