has used RC4 encryption (for Datper malware) and AES (for xxmm malware) to obfuscate HTTP traffic.  has also used a tool called RarStar that encodes data with a custom XOR algorithm when posting it to a C2 server.
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 RC4 encryption (for Datper malware) and AES (for xxmm malware) to obfuscate HTTP traffic.  has also used a tool called RarStar that encodes data with a custom XOR algorithm when posting it to a C2 server. ### Response: T1573.001.