has used `%HiddenReg%` and `%HiddenKey%` as part of its persistence via the Windows registry.
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 `%HiddenReg%` and `%HiddenKey%` as part of its persistence via the Windows registry. ### Response: T1564.