has used DNS for C2 including the publicly available requestbin.net tunneling service.(Citation: Unit 42 Playbook Dec 2017)(Citation: FireEye APT34 Webinar Dec 2017)(Citation: FireEye APT34 July 2019)
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: has used DNS for C2 including the publicly available requestbin.net tunneling service.(Citation: Unit 42 Playbook Dec 2017)(Citation: FireEye APT34 Webinar Dec 2017)(Citation: FireEye APT34 July 2019) ### Response: T1071.004.