When asked if Apple users can not be affected by such cyber-attacks, Aleksandr Yampolskiy, chief executive officer and founder of SecurityScorecard, said on Squawk Box that it is a common misconception.
Europol said a special task force at its European Cybercrime Centre was "specially created to assist in such investigations and will play an important role in supporting the investigation".
As of 1400 GMT, the total value of funds paid into anonymous bitcoin wallets the hackers are using stood at just $55,169, from 209 payments, according to calculations made by Reuters using publicly available data.
Over the weekend, a cyber attack the likes of which the world has never seen held important data, pictures, and information hostage demanding Bitcoin ransom payments from anxious users everywhere. The Japan Computer Emergency Response Team Coordination Center, a nonprofit group, said 2,000 computers at 600 locations in Japan were affected.
Experts and officials offered differing estimates of the scope of the attacks, but all agreed it was huge.
Computer systems at companies and hospitals in dozens of countries were hit Friday, apparently part of a huge extortion plot. This is because the virus has especially affected older Microsoft systems by taking advantage of a weakness found in documents leaked from the US National Security Agency.
Microsoft said the situation was "painful" and that it was taking "all possible actions to protect our customers". Users who do not patch their systems and the Shadow Brokers were more directly responsible for the attack than NSA, they said.The Department of Homeland Security began an "aggressive awareness campaign" to alert industry partners to the importance of installing the Microsoft patch shortly after it was released in March, an agency official working on the attack said.
However, the note said that no GP practice computers had actually been infected by the malware.
Wallace said the government used to contract for computer services across the entire NHS but that in 2007 that was stopped and left to the individual trusts.
It was not yet known who perpetrated Friday's attacks. Universities in Greece and Italy also were hit.
Russian Interior Ministry, which runs the national police, said the problem had been "localized" with no information compromised. The western MI resident said he noticed the authors of the malware had left in a feature known as a kill switch.
"If you have anything to patch, patch it", the researcher said in a blog post.
Scottish ministers have convened an extraordinary meeting of the National Cyber Resilience leaders' board. The danger will be discussed at the G7 leaders' summit next month.
Meanwhile, Irish hospitals suspected of being hit by the worldwide cyber attack had been targeted by a different, older virus, health chiefs have revealed.
When asked if the government ignored warnings that the NHS could be vulnerable to cyber attacks, Prime Minister Theresa May told Sky News that the United Kingdom healthcare system was given ample warning about the risks posed by out-dated systems.