WannaCry: The cyber-attack on Friday has hit more than 200.000 victims in 150 countries, says Europol chief Rob Wainwright at the BBC. Continuing he said the hack was "unprecedented in scale" and warned that more people could be found among the victims on Monday morning.
Ransomware continues to encrypt its victims' records, requiring payments. Russia and the United Kingdom were among the countries most affected.
Experts say there could be another attack and warn the public to update their systems. Wainwright, head of the European Union law enforcement agency, said that ransomware uses a worm application in addition to infecting the computer, allowing it to "spread quickly across all networks".
And he added: "That's why we see these numbers growing constantly."
Although a temporary fix (the kill switch domain of MalwareTech) had slowed down the infection rate earlier, the attackers released a new version of the ransomware, he said.
Businesses need to make sure they have updated their systems and "corrected the points they should have corrected" before their staff came to work on Monday morning, said Rob Wainwright.
In England, 48 National Health Service (NHS) (from the National Health Service) reported problems in hospitals, GP surgeries or pharmacies and in 13 NHS services in Scotland.
What happened was a "indiscriminate attack on multiple industries and services," said Mr Wainwright, including Deutsche Bahn, the Spanish telecommunications company Telefonica, the American logistics company FedEx and the interior ministry of Russia.
However, he said that so far "remarkable" payments have been made by the victims of the attack.
According to the BBC hackers have received £ 22,080 from England.
The head of Europol said his agency is working with the US Federal Bureau of Investigation (FBI) to find those responsible and that more than one person is likely to be involved.
Recall that the virus exploits a vulnerability in Microsoft Windows software, which was first detected by the US NSA.
After a successful infection, it displays messages that require a $ 300 (or £ 230) payment to the Bitcoin virtual currency to unlock the files and be able to use the victim again.
Microsoft released security updates last month to address vulnerability, but it also released an update yesterday for systems that no longer support it.
What is to be done in the next few days:
Security investigator "MalwareTech", who helped him limiting the WannaCry ransomware attack, has already predicted "another one that comes ... probably on Monday." The MalwareTech statement has a basis, since both Rob Wainwright of Europol said the attackers were releasing a new version of the ransomware.
22er who wants to remain anonymous told the BBC that it is very important for everyone to update their systems as soon as possible.