For  the threat actors used dynamic DNS domains from a variety of free providers including No-IP Oray and 3322. 
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: For  the threat actors used dynamic DNS domains from a variety of free providers including No-IP Oray and 3322.  ### Response: T1568.