During  the threat actors used code to obtain the external public-facing IPv4 address of the compromised host. 
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: During  the threat actors used code to obtain the external public-facing IPv4 address of the compromised host.  ### Response: T1016.