has encrypted files using an RSA key though the `CryptEncrypt` API and has appended filenames with .lock64. 
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 encrypted files using an RSA key though the `CryptEncrypt` API and has appended filenames with .lock64.  ### Response: T1486.