A statement, issued jointly by Foreign Affairs Minister Marise Payne and Home Affairs Minister Peter Dutton, said: "The sustained cyber intrusions by APT10 were significant and focused on large scale managed service providers (MSPs) – specialist companies that manage IT services and infrastructure for many medium to large businesses and organisations, both in Australia and globally".
While it was not mentioned specifically, the statement appeared to be referring to allegations made overnight by the US Department of Justice, which said two Chinese men had been charged with numerous hacks dating back to 2006.
Payne and Dutton said: "When it is in our interests to do so, Australia publicly attributes cyber incidents, especially those with the potential to undermine global economic growth, national security and international stability.
New Zealand also joined the chorus of condemnation of China, with the Government Communications Security Bureau claiming it had established links between the Chinese Ministry of State Security and "a global campaign of cyber-enabled commercial intellectual property theft".
“This long-running campaign targeted the intellectual property and commercial data of a number of global managed service providers, some operating in New Zealand,” GSCB director-general Andrew Hampton said.
“This activity is counter to the commitment all APEC economies, including China, made in November 2016. APEC economies agreed they should not conduct or support ICT-enabled theft of intellectual property or other confidential business information, for commercial advantage."
The UK and Canada issued similar statements. Foreign Secretary Jeremy Hunt said: "This campaign is one of the most significant and widespread cyber intrusions against the UK and allies uncovered to date, targeting trade secrets and economies around the world.
"These activities must stop. They go against the commitments made to the UK in 2015, and, as part of the G20, not to conduct or support cyber-enabled theft of intellectual property or trade secrets.
"Our message to governments prepared to enable these activities is clear: together with our allies, we will expose your actions and take other necessary steps to ensure the rule of law is upheld."
Canada's Communications Security Establishment said in a statement: "Today, many of Canada’s allies and partners have made statements concerning the compromise of several managed service providers. CSE also assesses that it is almost certain that actors likely associated with the People’s Republic of China Ministry of State Security are responsible for the compromise of several MSPs, beginning as early as 2016."
The Australian Cyber Security Centre has issued advice to MSPs on its website, as to how they can lower the risk to which they are exposed.