MalwareTech, who wants to remain anonymous, was hailed as an "accidental hero" after registering a domain name to track the spread of the virus, which actually ended up halting it.
Several cybersecurity firms said they had identified the malicious software behind the attack, which has apparently hit Russian Federation the hardest.
He was quoted as saying he noticed the web address the virus was searching for had not been registered - and when he registered it, the virus appeared to stop spreading.
Most other malicious programs rely on humans to spread by tricking them into clicking on an attachment harbouring the attack code.
Defence minister Michael Fallon told the BBC the government under Prime Minister Theresa May was spending around 50 million pounds on improving the computer systems in the NHS after warning the service that it needed to reduce its exposure to "the weakest system, the Windows XP".
Avast said the majority of the attacks targeted Russia, Ukraine and Taiwan - though exactly which computers in those areas were targeted remains fuzzy.
The worldwide cyberextortion attack has prompted Microsoft to take the unusual step of making security fixes available for older Windows system.
Dozens of countries were hit by the ransomware attack on Friday that locked up computers and held users' files for ransom at a multitude of hospitals, companies and government agencies.
The most disruptive attacks were reported in the United Kingdom, where hospitals and clinics were forced to turn away patients after losing access to computers. Once inside an organisation's network, the malware behind the attack spread rapidly using this vulnerability.
Cyber security experts say many companies may be affected, but won't find out until they reopen for business tomorrow morning.
"The global reach is unprecedented".
Massive Ransomware Hack Hits Windows Users Worldwide Hospitals in London , northwest England and other parts of the country reported problems with their computer systems Friday. National Security Agency (NSA), which exposed that secretive agency's hacking tools, including several Zero Day exploits.
Renault's futuristic assembly line in Slovenia, where rows of robots weld vehicle bodies together, was stopped cold.
Europol said its cybercrime specialists will support affected countries as a "complex global investigation" to identify the culprits begins.
Jan Op Gen Oorth, spokesman for the Netherlands-based Europol, said the number of individuals who have fallen victim to the cyberextortion attack could be much higher.
The cyberattack has severely affected Britain's healthcare services.
Ransomware attack hit more than 200,000 victims in 150 countries, European police agency director said.
The attack is believed to be the biggest online extortion attack ever recorded.
Germany's rail operator Deutsche Bahn said its station display panels were affected.
The head of Turkey's Information and Communication Technologies Authority or BTK says the nation was among those affected by the ransomware attack. The company said the virus has been localized and "technical work is underway to destroy it and update the antivirus protection". Omer Fatih Sayan said the country's cyber security centre was continuing operations against the malicious software. The team asked users to update antivirus applications and not open suspicious phishing emails.
Sixteen National Health Service organizations in the United Kingdom were hit, and some of those hospitals canceled outpatient appointments and told people to avoid emergency departments if possible.
Described as the greatest cyber ransom assault, the attack started on Friday affecting state agencies and important companies around the globe including Russian banks, British hospitals in addition to FedEx as well as European vehicle factories.
As of early this morning, the BC Green Party does. "So it is my intention to continue to lead British Columbia's government". But Weaver said it was too soon to say whether he will back the NDP or Liberals in B.C.'s new minority parliament.
Tottenham could go unbeaten at home for the first time in a league season since 1964/65 (W16 D2 L0 this season). A record-equalling 14th successive home league victory only underlines the club's progress and promise.
Although effective in his point guard role with six assists in the opening quarter, Wall struggled to find his shot. The Wizards fell one win short of their goal of 50 for the regular season, but that would certainly make up for it.
The BBC report that the sub-two hour marathon would require Kipchege to run 17 seconds for 100 metres 422 times consecutively. Kipchoge did break his personal best time of 2:03:05, which was set at the London Marathon a year ago .
But if we lock in like we did tonight, limit our turnovers, limit their transition that gives us the best chance to win the game. John Wall is averaging 28.1 points and 10.5 assists while Bradley Beal is averaging 22.9 points and 3.4 rebounds.
Softbank-backed e-commerce firm Snapdeal has finally agreed to sign a non-binding letter of intent for a merger with Flipkart. ANI Technologies, which runs Ola, reported revenues of Rs 758.23 crore in 2015-16 and a loss of around Rs 2,313.7 crore.
They had an April 16 game at Oakland postponed that will be made up as part of a doubleheader on September 9 at the Coliseum. YES will broadcast the first game of the doubleheader and ESPN will broadcast the second game of the doubleheader.
In FP2, the wind picked up and caused plenty of wobbly moments out on track, with Vettel and Verstappen going through the gravel. Alonso has already made a decision to try his luck at the Indianapolis 500 instead of the Monaco GP this month.
I told the players, do not panic, but it was a different game in the second half. "Call it a victory for football". We lacked defensive solidity in the first leg and we knew it would be hard after that.
The Dolphins had an immediate reply as they won the next draw , went down, and equalized with a goal from Erica Beal at 28:01. They are No. 1 in the nation right now, and we have the opportunity to go to their place and play them on Sunday.
The number of new cases among young people pales in comparison, said Brian Skorney, an analyst with Robert W. Miller says people who are actively injecting drugs should get tested for the virus every six months.
Ukraine says detains prankster who mooned during Eurovision
Vitalii Sediuk is famous for his pranks as past year he assaulted Kim Kardashian and Gigi Hadid during their visits in Paris. The flasher draped in an Australian flag has turned out to be Ukranian media personality Vitalii Sediuk , ABC reports .
'I Know That I'm Not Under Investigation'
Later, Ms Sanders said, "We want this to come to its conclusion, we want it to come to its conclusion with integrity". Trump confirmed that asked Comey on three separate occasions whether or not he was under investigation.
The new Mother's Day must-have gift: an experience
What is Mother's Day to most moms? Moreover, we can pay a gratitude towards her for the bounds and bounds of love given by her. Mother's Day is about pampering your mom so if you can't afford a real spa trip for her make her one at home.
Dismal Hull condemned to relegation
Currently, Crystal Palace is in the 16th position and Hull City is in the 18th position in the Premier League points table. Here, Press Association Sport looks at five things we learned in the Premier League this weekend.
Canada rejects US duties on lumber as 'baseless'
According to French Finance Minister Michel Sapin, all the other rich countries unanimously called on USA to respect global trade. The meeting also coincided with news of a significant foray by the Trump administration into global commerce.
Senate Overwhelmingly Approves US Trade Rep Robert Lighthizer
A fixture in Washington trade policy circles for almost four decades, Lighthizer has built a reputation as a shrewd negotiator. His biggest critics were two arch supporters of Nafta and other trade deals, Republican senators John McCain and Ben Sasse.
Miley Cyrus Sings and Dances for Love in 'Malibu' Music Video
While Miley focuses on the sunshiny version of the city, in Courtney's Malibu the palm trees are, literally, bursting into flames. She said: "I f***ing hate it when people can't adjust". "Now I'm as free as birds catching the wind", she sings at one point.