has used hidden or non-printing characters to help masquerade service names such as appending a Unicode no-break space character to a legitimate service name.  has also impersonated the legitimate Flash installer file name install_flashplayer.exe.
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 hidden or non-printing characters to help masquerade service names such as appending a Unicode no-break space character to a legitimate service name.  has also impersonated the legitimate Flash installer file name install_flashplayer.exe. ### Response: T1036.004.