has compromised third parties and used compromised accounts to send spearphishing emails with targeted attachments to recipients.(Citation: Unit 42 MuddyWater Nov 2017)(Citation: FireEye MuddyWater Mar 2018)(Citation: Securelist MuddyWater Oct 2018)(Citation: ClearSky MuddyWater June 2019)(Citation: Anomali Static Kitten February 2021)(Citation: Trend Micro Muddy Water March 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: has compromised third parties and used compromised accounts to send spearphishing emails with targeted attachments to recipients.(Citation: Unit 42 MuddyWater Nov 2017)(Citation: FireEye MuddyWater Mar 2018)(Citation: Securelist MuddyWater Oct 2018)(Citation: ClearSky MuddyWater June 2019)(Citation: Anomali Static Kitten February 2021)(Citation: Trend Micro Muddy Water March 2021) ### Response: T1566.001.