decrypted its  payload using an AES-256 encryption algorithm in CBC mode with a unique key per sample.(Citation: Symantec RAINDROP 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: decrypted its  payload using an AES-256 encryption algorithm in CBC mode with a unique key per sample.(Citation: Symantec RAINDROP January 2021) ### Response: T1140.