Russia's Rosneft energy company also reported falling victim to hacking, as did shipping company A.P. Moller-Maersk, which said every branch of its business was affected.
Researchers say hackers used a code known as "Eternal Blue", which is believed to be stolen from the U.S. National Security Agency, and also used in last month's ransomware attack.
Meanwhile, Kapersky Lab researchers have noted that the ransomware used in the assault may not even use the Petya virus at all. Ransomware attacks have been soaring and the number of such incidents increased by 50 percent in 2016, according to Verizon Communications Inc.
Microsoft said the virus could spread through a flaw that was patched in a security update in March.
The precise method by which the intruder circulates - such as by email or through a "worm" - remains unclear, specialists said.
"The company's telemetry data indicates around 2,000 attacked users so far", its statement continued, noting Ukraine and Russian Federation appear to be the most affected.
Other companies that said they had been hit by a cyber attack included Russian oil producer Rosneft, French construction materials firm Saint Gobain and the world's biggest advertising agency, WPP - though it was not clear if their problems were caused by the same virus.
Victims were locked out of their computer and told to purchase a key to reinstate access.
"We are talking about a cyberattack", said Anders Rosendahl, a spokesman for the Copenhagen-based group.
"As a result of these cyber-attacks, banks were forced to restrict the functionality of services provided to customers". That cyber attack impacted everything from major worldwide companies to hospitals. The ransomware also appears to be spreading outside of Europe as several American companies are reporting disruptions, including drug giant Merck and law firm DLA Piper.
United Kingdom media company WPP's website is down, and employees have been told to turn off their computers and not use WiFi, according to a person familiar with the matter.
Ukraine's central bank on Tuesday said a cyberattack hit several lenders in the country, hindering operations and leading the regulator to warn other financial institutions to tighten security measures.
"With there being no global kill switch for this one, we'll continue to see the numbers rise in different parts of the world as more vulnerable systems become more exposed", said Beau Woods, deputy director of the Cyber Statecraft Initiative at the Atlantic Council in Washington.
"We stand ready to support any requests for assistance", officials said in a statement.
SingCERT advised all users and companies with these affected systems to ensure they are fully patched, antivirus software is updated with the latest malware definitions and perform file backups and store them offline in case they need to restore their systems following an online attack.
Still, the attack could be more risky than traditional strains of ransomware because it makes computers unresponsive and unable to reboot, Juniper Networks JNPR.N said in a blog post analysing the attack.
The U.S. -led coalition in Syria meanwhile is keeping a close eye on Iran's military involvement with the Syrian regime. The Iranians have been basing Shahed-129 drones at the airfield, according to the officials.
McConnell's decision was so last-minute that even senior Senate Republicans appeared unaware that the announcement was coming. Carl Blake, associate executive director of Paralyzed Veterans, wrote in a letter sent to all 100 senators.
After the president made his opening remarks, he asked the press to leave so that they could discuss the bill. A group of Republican senators has already said they will not vote for the bill in its current form.
Ukrainian prosecutors said this week they'd found no proof of illicit payments to Manafort for his work for the party. On Wednesday, he retroactively registered as a foreign agent , giving America a look into the details of those ties.
It is unknown at the moment whether Russian Federation will receive other color variants of the Honor 9 . Despite the change in tack, the camera still operates in a similar way to its predecessors' snapper.
Bertrand skippered Australia II to victory over Dennis Conner in 1983 to end the New York Yacht Club's 132-year winning streak. The New Zealand crew had been on a mission to wipe out the hurt inflicted when an 8-1 lead was overhauled by the USA team.
The Supreme Court on Monday began the process of rebuking lower courts for usurping the political branches on national security . The American Civil Liberties Union welcomed the Supreme Court's decision to hear the case.
That lil' tyke stepped back into the spotlight recently when Tom Holland stated the boy was actually a young Peter Parker . And some did not wait long before asking Kevin Feige the importance that the presence of the Prowler has in Homecoming .
The current-gen Snapdragon 435 chipset is clocked at 1.4GHz while the next-gen Snapdragon 450 chipset will be clocked at 1.8GHz. According to Qualcomm, the Snapdragon 450 boasts 25% more GPU and CPU performance than its predecessor, the Snapdragon 435.
The court ruled that Missouri's decision to deny TLC state funding for its church playground violated the free exercise clause. Neither was Justice Sonia Sotomayor, who wrote a passionate dissent in which she was joined by Justice Ruth Bader Ginsburg.
As a precaution, the region to the northwest of the fire, a remote area called Upper Bear Valley, has been evacuated, she said. Fire crews are battling dry, windy conditions and what officials say is a "high potential" for extreme fire behaviour.
Justices to review New Jersey bid for legal sports betting
But the five major sports leagues are against it. "That will enable sports betting to be enjoyed by millions of Americans". Senator Bill Bradley is among those who have come out in opposition to legalized sports gambling in his home state.
Djokovic bumped up to two in Wimbledon seedings
Grass-court lover Gilles Muller is the big mover, with the Luxembourger ranked 26th by ATP but seeded 16th for the Wimbledon draw. After the loss, he was forced to be out of the tour for the remainder of the year because of a knee injury.
Cyber Attacks Cripple Companies Worldwide
Interpol says it is also "closely monitoring " the suspected attack. "This could hit the United States of America pretty bad". It came as Russian oil giant Rosneft said its servers had suffered a "powerful" cyberattack .
Trump lawyer defends his use of social media
The message apparently referred to Rosenstein, whose role leading the federal investigation has become increasingly complicated. I believe the - I take the president at his word, that I was sacked because of the Russian Federation investigation.
Cris "Cyborg" Gets New Opponent For UFC 214
Her most recent victory earned her the interim Invicta FC featherweight title, which was later installed to full time champion. Both bouts took place at a catchweight of 140 pounds, with UFC 214 set to be her first trip to the Octagon as a featherweight.
Painless Flu Vaccine Patch?
Nadine Rouphael , first author of the study and professor at the Emory University School of Medicine said in a news release. The team also found that the drugs in the patch could stay viable for over a year, without the need for refrigeration.
Kevin Harvick wins at Sonona for 1st victory of season
Vettel accused Hamilton of "check braking" him on a restart, causing Vettel to run into the back of Hamilton's then-leading auto . Hagan took his third No. 1 qualifier of the season with a 3.865-second pass at 333.33 miles per hour in a Dodge Charger R/T.
Google News redesign unsurprisingly angers everyone
When you click on a story card , News will show you related articles from a range of publishers offering different perspectives. The redesign is a way for Google to stay competitive and beat other news readers, like Apple News, Facebook , and Twitter .
Jaguar's XE SV Project 8 is its most powerful road auto ever
To create the appropriate ambience, the cabin is decked out with generous helpings of Gloss Carbon Fibre and Alcantara trim. Manually adjustable suspension and aerodynamics make the Project 8 hugely appealing to well-heeled track day enthusiasts.
Sanders attacks CNN, media in briefing
CNN is claiming that the only reason the hit piece was published was because "standard editorial processes were not followed". The story had stated that USA lawmakers were investigating a possible link between a Russian investment fund and Mr.