Vasyl Myroshnychenko said he would welcome any further assistance with Ukraine's defence against Russia, adding it would provide Australia with a good opportunity to stress test its own resources.

"Providing cyber assistance can be beneficial for Australia as well. We haven't seen a war like this before and Australia deals with cyber attacks on a daily basis," he told AAP.

"The countries that get the continual feedback will be the countries helping in Ukraine."

The opposition has attacked the government for refusing a request from Ukraine to provide cyber assistance.

The opposition's foreign affairs and cyber security spokesmen issued a joint statement that said Russian cyber attacks, disinformation and sabotaging of critical infrastructure needed to be combated.

"Ukrainian and Australian officials have acknowledged that Ukraine is fighting a hybrid war against Russia, one on the ground and one in the digital realm," Senators Simon Birmingham and James Paterson said.

"A comprehensive package of assistance should be provided to make sure that we continue to defend international laws and the rules-based order which are under direct attack by Russia through their invasion of Ukraine."

Home Affairs Minister Clare O'Neil said she wouldn't go into detail about Australia's cyber posture but is open to discussions with Ukraine about further assistance.

"We consider proposals from time to time," she said.

The US government and intelligence agencies are working with Ukraine to counter Russian hacking and cyber attacks.

The National Security Agency has used the intelligence gathered to release at least two dozen unclassified advisories about what could be expected from Russian attacks, including against critical infrastructure.

Yet there have been warnings about the potential for future attacks to evolve.

The United States Studies Centre's senior economic adviser John Kunkel said Australia needs to work alongside Washington to maintain an advantage in the cyber domain over potential attackers.

Australia's strategic review highlighted the importance of new and emerging technologies, Dr Kunkel said.

He said the second stage of the AUKUS alliance with the US and UK, with the first stage being nuclear-powered submarines, was vital.

"We need equal focus on AUKUS Pillar II - our national offering in areas such as artificial intelligence, quantum and cyber," Dr Kunkel said.

The Australian government will release its first national defence strategy next year, in line with the recommendations from the defence review.

Australian Associated Press