A hacking group called Shadow Brokers released the malware in April, claiming to have discovered the flaw from the NSA, Kaspersky said.
But Prime Minister Theresa May has rejected claims the Government ignored warnings the health service was vulnerable, and said the Government was putting £2bn into cyber security.
"We weren't able to ingest the threat vector, which was probably an email that contained this malicious code in it, or a link to malicious code, and as a effect we were probably better protected than our European cousins".
The government is targetting small businesses in it's mitigation messaging which it believes are most at risk from the ransomware.
The virus infected over 200,000 computers in 150 countries, locking the contents of their drives unless a ransom of $300 or $600 was paid in Bitcoin.
"Although we have never seen anything on this scale when it comes to ransomware attacks, they are relatively common and there are things that you can do, that everyone can do, all of us can do, to protect ourselves against them", he said.
The recent global cyber attack has affected more than 200,000 people - so should you be anxious about your own online security?
In January, Comey Reportedly Told Trump He'd Give Him 'Honesty'-Not Loyalty
He also suggested accuracy might be improved by handing out written responses rather than holding press briefings. President Donald Trump's decision to fire FBI Director James Comey has been a moving target.
"Yes, ransomware is a major problem in Australia, and this attack is no different... it doesn't discriminate and affects home and business users", he said.
The government is advising Australians to back up their data and update Windows operating systems.
"We've never seen anything like this", the head of the European Union's policing agency told Britain's ITV television Sunday.
The attack, Smith says, "represents a completely unintended but disconcerting link between the two most serious forms of cybersecurity threats in the world today - nation-state action and organized criminal action".
Patients of the state-funded country-wide service are facing days of chaos as appointments and surgeries were cancelled after almost 45 NHS organisations from London to Scotland were hit.
In England, some hospitals were forced to cancel procedures and appointments, as ambulances were directed to neighbouring hospitals that had avoided the attack, according to BBC reports.
However, this morning the trust confirmed it had not suffered from the attack, which also targeted the Russian Interior Ministry and Spanish telecoms giant, Telefonica, amongst other global organisations.
Trump hired Flynn despite knowing he was under investigation
In March, The Times reported Flynn had readily admitted a Turkish firm called Inovo hired him as a lobbyist in 2016. The transition's legal team and Flynn's attorney discussed the ongoing investigation again two days later.
Arsenal's title challenge failure is frustrating - Sanchez
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Jason Aldean and Zac Brown Band Eulogize Chris Cornell His theme song for 2006's James Bond film Casino Royale broke into the Top 10 in the United Kingdom singles chart. Soundgarden frontman Chris Cornell has died after a sold-out Detroit concert on Wednesday, May 17, at age 52.
Tulsa police chief: Protests to remain peaceful The police chief will review an internal affairs investigation that will determine whether she again patrols Tulsa streets. Crutcher's family was heartbroken by the verdict and said that the police department is corrupt, according to NBC News .
UK restoring systems after cyberattack With ransomware , criminals typically trick individuals into opening an email attachment containing malicious software. The NHS said in a statement on Saturday that there was no evidence that patient information had been compromised.
Minecraft: Xbox One Edition And Free Multiplayer This Weekend
This weekend, Microsoft is inviting all Xbox Live members to play online with their friends for free on any game they own. That means that through May 21, non-members will be able to enjoy all of the perks usually reserved for Gold Members.
Drug pricing regulator clamps down on drug cocktails
The action targets a group of more than 300 medicines that India defines as essential, whose prices it controls to ensure they are affordable.
Bella Hadid Suffers Wardrobe Malfunction at Cannes Two Years in a Row
They go to a movie theater to be humbled in front of certain images, and there's other films that they prefer to watch at home. But Smith said Netflix was not a threat to movie theaters, as people watched streaming video and also went to the cinema.
'No. No. Next question': Trump's terse Federal Bureau of Investigation denial Trump said that Comey "was very unpopular with most people" and said that he was expecting more widespread praise for the firing. In a statement after the Justice Department announcement, Trump said he looked forward to a quick resolution of the matter.
Russian President Vladimir Putin steals the show with piano recital in Beijing In 2014, he plunked out the same "Moscow Windows " at a meeting with students at the Moscow Engineering and Physics Institute. But he has also displayed his artistic side, singing Fats Domino's "Blueberry Hill " in English at a charity event in 2010.
Toomey says GOP striving for middle ground on Medicare expansion This increased funding will greatly benefit the Central Valley, which has 57 community health centers serving the community. The bill - commonly referred to by its abbreviation, the AHCA - would directly impact Access Health , Wadleigh said.
Venezuelan protest strife adds two deaths Several buildings were in flames and dozens injured, including one young woman, who stood on a street, her face covered in blood. Venezuelan opposition activists protest against the government of President Nicolas Maduro, in Caracas , on May 15, 2017.
Ian Brady, Moors murderer, dies aged 79
Ian Brady and Myra Hindley went down in history as two of the sickest serial killers ever to stalk the United Kingdom. But twisted Brady is believed to have written a letter to Keith's mum Winnie Johnson - to be opened when he died.
U.S. sanctions 8 Venezuelan Supreme Court judges Wednesday a man was shot and killed by National Guard members while walking home with diapers he had just purchased. But sanctions so far have stopped short of hitting the oil sector in Venezuela, which is a major U.S. oil supplier.
Senate Intelligence Committee invites Comey to testify publicly Ryan said Congress needs to get the facts, but "it is obvious there are some people out there who want to harm the president". Every couple days, there is a new aspect of this really unhappy situation", McCain said .