British media had reported a year ago that most public health organisations were using an outdated version of Microsoft Windows that was not equipped with security updates. In an interview on ABC's "This Week", Clapper said the worry was "this ransomware attack will be even larger" as people return to their desks after the weekend.
"The WannaCry ransomware outbreak is a wakeup call for the world", said Andreas Kuehlmann, senior vice president of the software integrity group at software provider Synopsys. The Administration noted that this global attack shows again the unprecedented challenges ahead in terms of Internet security.
Brian Lord, managing director of cyber and technology at cyber security firm PGI, said victims had told him the hackers offered good service, with helpful advice on how to pay: "One customer said they actually forgot they were being robbed".
Windows Story Remix, one of the new applications arriving with the Fall Creators Update, will use deep learning and artificial intelligence to let users organize and present their photos and videos in new ways.
"But it is important to understand that the way these attacks work means that compromises of machines and networks that have already occurred may not yet have been detected, and that existing infections from the malware can spread within networks".
"The number of infected computers has not increased as expected, which is a success", European law enforcement agency Europol said Monday.
The attack held users hostage by freezing their computers, encrypting their data and demanding money through online bitcoin payment - $300 at first, rising to $600 before it destroys files hours later.
The ransomware is known as WannaCry, and many outlets are reporting that it took advantage of a vulnerability in Windows that Microsoft patched earlier this year.
The criminals behind the attack have not yet been identified. He said the main challenge was the fast-spreading capabilities of the malware, but added that, so far, not many people have paid the ransoms that the virus demands.
It said in a statement: "NHS Digital issued a targeted update on a secure portal accessible to NHS staff on April 25, and then via a bulletin to more than 10,000 security and IT professionals on April 27 to alert them to this specific issue".
Governments "need to take a different approach and adhere in cyberspace to the same rules applied to weapons in the physical world", Smith says, urging agencies to "consider the damage to civilians that comes from hoarding these vulnerabilities and the use of these exploits".
Teams of technicians worked "round the clock" on Saturday to restore hospital computer systems in Britain and check transport services in other nations after a global cyber attack that hit dozens of countries crippled the UK's health system. The exploit was leaked last month as part of a trove of USA spy tools.
"Whenever there is a new patch, there is a risk in applying the patch and a risk in not applying the patch", Grobman said. Companies including Hitachi and Nissan Motor Co. reported problems but said they had not seriously affected their operations.
"The recent attack is at an unprecedented level and will require a complex worldwide investigation to identify the culprits", the European police agency added. In Indonesia, the ransomware locked patient files on computers in two hospitals in the capital, Jakarta, causing delays.