Dynamic DNS resolution (as obfuscation technique)

Adversaries may dynamically establish connections to command and control infrastructure to evade common detections and remediations. This may be achieved by using malware that shares a common algorithm with the infrastructure the adversary uses to receive the malware's communications. These calculations can be used to dynamically adjust parameters such as the domain name IP address or port number the malware uses for command and control. (https://attack.mitre.org/techniques/T1568/)