has used spearphishing attachments to deliver initial access payloads.(Citation: Recorded Future REDDELTA July 2020)(Citation: Proofpoint TA416 November 2020)
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 spearphishing attachments to deliver initial access payloads.(Citation: Recorded Future REDDELTA July 2020)(Citation: Proofpoint TA416 November 2020) ### Response: T1566.001.