The ransomware is a type of malicious software that infects a computer and restricts users' access to it until a ransom is paid to unlock it.
An global manhunt was under way for the plotters behind the world's biggest-ever computer ransom assault which has affected more than 150 countries.
Microsoft which had discontiued security updates to its out-of-date software, has also provided a security update for all customers using Windows 8 and Windows Server 2003, anticipating further attacks on these earlier platforms being used by millions.
It also threatens to delete the files if payment is not made within seven days. As per reports, the ransomware has hit as many as 2,00,000 victims in over 150 countries. Experts predicted that they'd see a new, harder-to-stop variant appear, and they did: Another researcher registered another "kill switch" domain on Sunday, and infection rates continued to drop.
"Everything seems to be normal, so far". Microsoft did issue patches for the vulnerabilities before the attacks took place, but not everyone downloaded them.
Carmaker Renault said its plant in the northern town of Douai would not reopen on Monday as it dealt with the cyber-attack.
"We, as IT professionals, always says, don't pay these people".
South Korea: Only nine ransomware cases.
In Japan, several large manufacturers have been hit, reporter John Matthews tells NPR: "Companies including Hitachi have reported several of their systems going down, including computers at a hospital in eastern Japan".
Banking systems across the region were largely unaffected. The statement said antivirus systems are working to destroy it.
Associated Press quoted Tim Wellsmore, of United States security firm FireEye, as saying: "We expect this is a small operation". He'd like governments to limit the creation of cyber weapons, just like they did for nuclear weapons.
Russian President Vladimir Putin said: "Russia has absolutely nothing to do with it".
Basic protocol such as stressing that workers shouldn't click on questionable links or open suspicious attachments can save headaches. It is true that those hackers are mostly after money and trust is crucial here.
Railway stations, mail delivery, gas stations, hospitals, office buildings, shopping malls and government services also were affected, China's Xinhua News Agency said, citing the Threat Intelligence Center of Qihoo 360, a Chinese internet security services company.
The massive ransomware attacks that started late Friday have locked people out of their computers and demanded hundreds of dollars from the users before they could regain control. "It's a wake-up call for both the country and the economy", he added.
The Department of Homeland Security was aware of a small number of potential victims in the USA and was working with them to confirm and mitigate the threat, a DHS official who requested anonymity told the E-Commerce Times. But the Redmond giant is wary of making this a regular practice because it could be stuck offering free updates to ancient software forever.
The cyberextortion attack hitting dozens of countries spread quickly and widely thanks to an unusual confluence of factors: a known and highly risky security hole in Microsoft Windows, tardy users who didn't apply Microsoft's March software fix, and a software design that allowed the malware to spread quickly once inside university, business and government networks. There's Microsoft, whose ubiquitous Windows operating systems were compromised after attackers exploited a security hole. Therefore, somebody, presumably the NSA, went and told Microsoft for inclusion in the February patch. If there is a flaw in Windows, the company said, surely the safest thing to do is to let its team know straight away so it can be fixed.
Users should regularly back up their data and ensure that security updates are installed on your computer as soon as they are released. Unfortunately, one of those corporations is the NHS (Nation Health Service) in England which impacted hospital operations by locking up critical data and requiring a BitCoin payment to release the information. Tough - time-consuming, expensive and complex. A big reason for this: They have expensive machinery like MRI machines that was created to work with Windows XP and doesn't work with more modern operating systems.style="text-align: center;"