For the   used numerous pieces of malware that were likely developed for or by the group including    and .(Citation: FireEye SUNBURST Backdoor December 2020)(Citation: CrowdStrike SUNSPOT Implant January 2021) 
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   used numerous pieces of malware that were likely developed for or by the group including    and .(Citation: FireEye SUNBURST Backdoor December 2020)(Citation: CrowdStrike SUNSPOT Implant January 2021)  ### Response: T1587.001.