China the likely culprit in massive Cyber attack on Australia, page-61

I am still waiting for details of this supposed massive cyber attack the PM announced.
I can't find any evidence which supports it having occurred.
What was accessed, what data was compromised, that sort of thing.
My internet has been working normally and I have not heard of anyone saying otherwise.
My ISP Telstra has not reported any problems, nor have any others that I know of.
So what happened Mr Morrison that you needed to make a special address to the Nation ?