malware ISMAgent falls back to its DNS tunneling mechanism if it is unable to reach the C2 server over HTTP.
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: malware ISMAgent falls back to its DNS tunneling mechanism if it is unable to reach the C2 server over HTTP. ### Response: T1008.