You seem to have contradicted yourself with this one.....as you correctly identified the CIA as a US Government Organization the. you pose the following question.
If it does something is it officially sanctioned by the US Government or more like does US Govt even know.
Is the first "it" defined as being the CIA?
Is the second "it" defined as some hypothetical act/action/plot/scheme/operation perpetrated by the CIA?
Then logically....the CIA by your first statement IS a US government organization....therefore you have answered your own question even as you ask it.
Do you have any grasp of how the CIA gets its authorizations to conduct covert operations?