"I am anxious about how the numbers will continue to grow when people go back to work and turn (on) their machines".
Organizations and networks worldwide have since Friday been dealing with the fallout of massive ransomware attack that exploited a hole in PCs running Microsoft Windows that haven't been updated. Security agencies in affected countries were racing to find out.
The effect in Asian nations so far on Monday has been limited.
Japan's Chief Cabinet Secretary Yoshihide Suga said there weren't any concerns about damage in the country.
Europol executive director Rob Wainwright told Britain's ITV television on Sunday that the attack had been "unprecedented".
Multiple leaks were posted, including one on April 14 of this year that contained an exploit (flawed computer code that can be used to craft cyberweapons) called EternalBlue.
With WanaCryptor and MS17-010 both "unleashed into the wild", F-Secure said the current problem seems to have combined and magnified the worst of the dangers those programs represent.
Britain's National Crime Agency, which tackles serious and organised crime, said it had not seen a second round of cyber attacks on Monday as experts had feared. The continued leak of information about the holes in technology firms' software has anxious the companies.
Grafi said his firm has been contacted by companies that are scrambling to avoid potential pitfalls.
In the letter they warned that "computer hardware and software that can no longer be supported should be replaced as a matter of urgency" and insisted that "more can be done to protect against potential risks".
Nissan: The carmaker said in a statement that "some Nissan entities were recently targeted" but "there has been no major impact on our business".
Targets large and small have been hit.
German rail operator Deutsche Bahn said some electronic signs at stations announcing arrivals and departures were infected.
After announcing "no incidents", the Cabinet's Department of Cyber Security on Saturday urged the public not to open any unknown e-mails or links to protect their computers from infection. The problem, however, is that over years and years, organizations and companies have created a patchwork of computer systems that have at times become too complex for them to fully manage or even comprehend.
The report said the continued use of "outdated systems" was "one of the most pressing issues facing IT infrastructure" in the NHS.
Around 1,000 computers at the Russian Interior Ministry have been affected by the cyber attack.
"IT Teams have been working all weekend however Computer systems will remain suspended tomorrow as a precaution whilst cyber-attack issues at our sister sites are dealt with".
Smith also called cyberattack protection a "shared responsibility" between companies and customers. He said the situation was under control.
The attack encrypted has the contents of thousands of computers and demanded a ransom for recovering the files.
The attack also hit Chelsea and Westminster Hospital NHS trust, which operates Chelsea and Westminster Hospital, West Middlesex Hospital and several clinics, including 56 Dean Street, Europe's biggest sexual health clinic, which was closed until 1pm today.
The commission had been tasked by Hunt with identifying threats to patient data. "Anyone who applied the patch that Microsoft released likely wasn't affected by this", Reiher said.
56 Dean Street is part of Chelsea and Westminster Hospital NHS trust, one of those impacted by the attack.
Microsoft's top lawyer is laying some of the blame at the feet of the USA government.
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