Federal agencies investigating breach, reported to be a ransom demand. Hackers have “scrambled” patient files at a Melbourne heart specialist clinic in what was reportedly a ransom attempt. The Australian Cyber Security Centre has confirmed it’s providing advice and assistance to the Melbourne Heart Group, which leases practice space from the Cabrini hospital in Malvern. “As the matter is ongoing, it is not appropriate to comment further,” a spokesman from the centre said. The Australian federal police is also involved in a joint investigation.