On Monday night the government said the ransomware - also known as Wana Decryptor, WannaCrypt and Wana - had affected eight Australian businesses, an increase from the "at least three" figure the government had claimed that morning.
It halted the production lines of a European carmaker and delayed surgical operations in Britain's National Health Service.
The number of infections has fallen dramatically since Friday's peak when more than 9,000 computers were being hit per hour.
Here are a few important things that you need to know about the worst ever cyber attack witnessed by the world: What is a ransomware? "Russian Federation has got absolutely nothing to do with it", Mr Putin said.
"Out of that batch, it is probably a high-water mark", Manky said.
The NHS, which was showcased in the opening ceremony of the 2012 Olympic Games, employs more than 1.5 million people, making it the world's fifth biggest employer after the U.S. and Chinese militaries, Walmart and McDonald's.
The home secretary said most NHS systems were back to normal after the cyber attack that left the service crippled.
"Patients already in hospital at this time will continue to receive normal care".
Who are the attackers?
Most Windows machines are set to download and install updates automatically by default. We are obviously working with that business the Australian Cyber Security Centre is engaging with them'.
"The software isn't up to date and so is vulnerable", he said.
"We weren't attacked but we took preventative measures about the cyber-attack over the whole weekend".
"We apologise to every patient whose treatment has been affected".
On Monday, the opposition Labour Party said Prime Minister Theresa May's response to the crisis had been poor and her government was to blame for failing to invest to keep the service secure.
Dozens of local Chinese authorities said they had suspended some of their services due to the attack that has disrupted operations at vehicle factories, hospitals, shops and schools around the world.
Problems with cyber security in NHS organisations were highlighted a year ago by Dame Fiona Caldicott, the national data guardian, who warned that issues were given insufficient priority and that health bodies persisted in using obsolete computer systems, The Times said.
Professor Clark said more information on protecting your computer was available via the IT security company Sophos and the National Cyber Security Centre, among other sources.
By bundling a tool farmed from the leaked NSA files with their own ransomware, "they achieved better distribution than anything they could have achieved in a traditional way" he said.
It instructed firms to "take immediate actions to critically review and assess the effectiveness of their cybersecurity controls".
But NHS Digital said it had made health trusts aware last month of IT protection that could have prevented the attack.
In a blog post, published by Brad Smith, president and chief legal officer at the company, on Sunday he said that the attack was enabled through National Security Agency (NSA) stockpiling exploits, rather than openly sharing discovered exploits so they could be fixed. "Banks have six to eight levels of defense".