Some  samples have used HTTP over ports 447 and 8082 for C2.(Citation: S2 Grupo TrickBot June 2017)(Citation: Fidelis TrickBot Oct 2016)(Citation: Trend Micro Totbrick Oct 2016) Newer versions of  have been known to use a custom communication protocol which sends the data unencrypted over port 443. 
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: Some  samples have used HTTP over ports 447 and 8082 for C2.(Citation: S2 Grupo TrickBot June 2017)(Citation: Fidelis TrickBot Oct 2016)(Citation: Trend Micro Totbrick Oct 2016) Newer versions of  have been known to use a custom communication protocol which sends the data unencrypted over port 443.  ### Response: T1571.