The Coalition Government will pledge $156 million to bolster cyber security efforts that are in place to guard the country's communications networks, with Prime Minister Scott Morrison set to make the pledge on Monday.

The Australian Signals Directorate has ascertained that hackers who breached the networks of the Australian Parliament and those of three main political parties — Liberal, Labor and National — are nation-state actors, but the agency's director-general, Mike Burgess, has said he cannot name the country involved in a public forum.

The Australian Parliament was hacked by a group based in Iran, a hitherto unknown security firm has claimed, adding that the Mabna Institute, which was backing the person or people involved, had also been implicated in attacks on the US and other Western countries.