This is not a quoll but it is a marsupial. It is a woylie or brush-tailed bettong, a critically endangered potoroid with a depressingly familiar history (once common all across the country, now restricted to south-west Australia due to fox predation, habitat loss, etc). You’ll have to take my word for it about the brush tail because i managed to take this photograph with a tree branch obscuring the brush – you can just see the black tip of its tail on the other side of the tree.