Detecting and protecting claimable non-existent domains
Techniques for detecting and protecting claimable non-existent domains are disclosed. A system, process, and/or computer program product for detecting and protecting claimable non-existent domains includes monitoring network activity using a network security device, detecting that a session is querying a claimable non-existent domain using a domain name system (DNS) security service, and performing an action in response to the session querying the claimable non-existent domain.
1 . A system, comprising:
a processor; and
a memory coupled to the processor and configured to provide the processor with instructions, when executed by the processor, to:
monitor network activity using a network security device;
detect that a session is querying a claimable non-existent domain (NXDOMAIN) using a domain name system (DNS) security service, wherein the detecting that the session is querying the claimable NXDOMAIN comprises to:
perform a high impact check, comprising to:
check a server-side source to identify a high impact NXDOMAIN; and
check a client-side source to identify a high impact NXDOMAIN, wherein the client-side source includes a telemetry log for determining domains having more than N customers or M visits, and/or a passive DNS log for determining domains having more than N customers or M visits, wherein N corresponds to a first positive integer, wherein M corresponds to a second positive integer; and
perform an action in response to the session querying the claimable NXDOMAIN.
2 . The system of claim 1 , wherein the server-side source includes a telemetry log, a passive DNS log, a DNS zone file, or any combination thereof.
3 . The system of claim 1 , wherein the client-side source includes an email domain list and/or a Whois database for determining recently expired domains.
4 . The system of claim 1 , wherein the detecting that the session is querying the claimable NXDOMAIN comprises to:
perform a claimability check for a candidate claimable NXDOMAIN.
5 . The system of claim 1 , wherein the detecting that the session is querying the claimable NXDOMAIN comprises to:
perform an internal resolvability check for a candidate claimable NXDOMAIN.
6 . The system of claim 1 , wherein the detecting that the session is querying the claimable NXDOMAIN comprises to:
perform a registration check for a candidate claimable NXDOMAIN.
7 . The system of claim 1 , wherein the claimable NXDOMAIN includes a root domain that is not registered or claimed and/or a rentable subdomain that is not registered or claimed.
8 . The system of claim 1 , wherein the action includes one or more of the following: block query, block a response to the claimable NXDOMAIN, alert an administrator, quarantine a source device querying the claimable NXDOMAIN, log a source device que rying the claimable NXDOMAIN, and/or register the claimable NXDOMAIN.
9 . A method, comprising:
monitoring network activity using a network security device;
detecting that a session is querying a claimable non-existent domain (NXDOMAIN) using a domain name system (DNS) security service, wherein the detecting that the session is querying the claimable NXDOMAIN comprises:
performing a high impact check, comprising:
checking a server-side source to identify a high impact NXDOMAIN; and
checking a client-side source to identify a high impact NXDOMAIN, wherein the client-side source includes a telemetry log for determining domains having more than N customers or M visits, and/or a passive DNS log for determining domains having more than N customers or M visits, wherein N corresponds to a first positive integer, wherein M corresponds to a second positive integer; and
performing an action in response to the session querying the claimable NXDOMAIN.
10 . The method of claim 9 , wherein the server-side source includes a telemetry log, a passive DNS log, a DNS zone file, or any combination thereof.
11 . The method of claim 9 , wherein the client-side source includes an email domain list and/or a Whois database for determining recently expired domains.
12 . The method of claim 9 , wherein the detecting that the session is querying the claimable NXDOMAIN comprises:
performing a claimability check for a candidate claimable NXDOMAIN.
13 . The method of claim 9 , wherein the detecting that the session is querying the claimable NXDOMAIN comprises:
performing an internal resolvability check for a candidate claimable NXDOMAIN.
14 . The method of claim 9 , wherein the detecting that the session is querying the claimable NXDOMAIN comprises:
performing a registration check for a candidate claimable NXDOMAIN.
15 . The method of claim 9 , wherein the action includes one or more of the following: block query, block a response to the claimable NXDOMAIN, alert an administrator, quarantine a source device querying the claimable NXDOMAIN, log a source device querying the claimable NXDOMAIN, and/or register the claimable NXDOMAIN.
16 . A computer program product embodied in a non-transitory computer readable medium and comprising computer instructions for:
monitoring network activity using a network security device;
detecting that a session is querying a claimable non-existent domain (NXDOMAIN) using a domain name system (DNS) security service, wherein the detecting that the session is querying the claimable NXDOMAIN comprises:
performing a high impact check, comprising:
checking a server-side source to identify a high impact NXDOMAIN; and
checking a client-side source to identify a high impact NXDOMAIN, wherein the client-side source includes a telemetry log for determining domains having more than N customers or M visits, and/or a passive DNS log for determining domains having more than N customers or M visits, wherein N corresponds to a first positive integer, wherein M corresponds to a second positive integer; and
performing an action in response to the session querying the claimable NXDOMAIN.