has gained access to internet-facing systems and applications including virtual private network (VPN) remote desktop protocol (RDP) and virtual desktop infrastructure (VDI) including Citrix. 
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 gained access to internet-facing systems and applications including virtual private network (VPN) remote desktop protocol (RDP) and virtual desktop infrastructure (VDI) including Citrix.  ### Response: T1133.