TA0042 · RESOURCE DEVELOPMENT
DNS Server
Adversaries may set up their own Domain Name System (DNS) servers that can be used during targeting. During post-compromise activity, adversaries may utilize DNS traffic for various tasks, including for Command and Control (ex: Application Layer Protocol).
Detect it with
Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.
Why it matters on shift
DNS Server is one of the concrete ways adversaries achieve resource development. Recognising it in telemetry lets you name the technique in your ticket and pivot to what came before and after.
What to look for next
After resource development, the next tactic is usually Initial Access. Search your telemetry for the transition before closing the ticket.
Kill-chain context