Neither. This was not written by Microsoft. This is not an exploit. Further, you never "identify an exploit" - you identify a vulnerability, and the exploit is

Neither. This was not written by Microsoft. This is not an exploit. Further, you never "identify an exploit" - you identify a vulnerability, and the exploit is what you build to take advantage of that vulnerability. This is software that has been written by presumably US govt to be installed on a windows machine to maintain control if it once they've compromised it. Think "really advanced malware". It is supposed to be hard to detect and/or remove, and allows long term access to that machine. Edit: hopefully that helps clear up. Also your line of questioning seems to suspect Microsoft colluding with the govt. zero evidence of that.