GETTY Vladimir Putin has blamed the US for WannaCry cyber-attack

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The Russian leader insisted the Kremlin had "nothing to do" with the attack and accused the US of creating the hacking software used to target Microsoft computers. He told reporters in Beijing: “One the whole it is worrying, there's nothing good about it, it is a source of concern. “As regards the source of these threats, I believe that the leadership of Microsoft have announced this plainly, that the initial source of the virus is the intelligence services of the United States.

Once they're let out of the lamp, genies of this kind, can later do damage to their authors and creators Vladimir Putin

"Once they're let out of the lamp, genies of this kind, especially those created by intelligence services, can later do damage to their authors and creators. "So this question should be discussed immediately on a serious political level and a defence needs to be worked out from such phenomena." Mr Putin said Russia had sought an agreement with the previous US administration on co-operation in the field of cyber security, but that Washington had dragged its feet and no deal was concluded.

GETTY Hackers used US-developed software to mount the unprecedented cyber-attack

Microsoft has condemned the US spy agency that originally developed software that allowed the ransomware attack to infect computers. The "Eternal Blue" tool was developed by the National Security Agency and was uploaded onto the internet by group of computer hackers called the Shadow Brokers. It was then hijacked by cyber-criminals who launched last Friday’s attack using WannaCry ransomeware which locked computer systems and demanded £230 in Bitcoin payments from each victim.

GETTY Dozens of NHS trusts across the UK were affected by the cyber-attack

Microsoft president Brad Smith said: "The governments of the world should treat this attack as a wake-up call. "Repeatedly, exploits in the hands of governments have leaked into the public domain and caused widespread damage. “An equivalent scenario with conventional weapons would be the US military having some of its Tomahawk missiles stolen." Microsoft released a patch over the weekend for the Eternal Blue vulnerability that defends against the ransomware even with older versions of Windows.

GETTY Bart's Health was one of the NHS Trust's hit by the hackers

The biggest cyber-attacks, hacks and data breaches Sat, May 13, 2017 From viruses to data breaches, cyber-crime is far from a modern invention - here is Express.co.uk's list of some of the biggest attacks in history. Play slideshow Getty Images 1 of 15 14 of the biggest cyber-attacks, hacks and data breaches in history