This cyber attack locked the computers and also demanded ransom for its recovery. The statement said antivirus systems are working to destroy it.
And the security agencies across the globe are trying to find the cyber-criminal responsible for the attack.
“We are in the second wave”, said Matthieu Suiche of the cybersecurity firm Comae Technologies on Sunday, per The New York Times.
NHS organisations across the country are warned that this software is likely to hit again today as staff return to work.
“This incident emphasises the importance for all of us – the public and private sectors, as well as the general public – to have the appropriate measures in place to protect against these kinds of attack”.
Some hospitals still asked patients on Monday to seek treatment only for life-threatening emergencies. He said no critical infrastructure operators or government agencies had been impacted.
Although Wannacry has been able to spread across networks without any user intervention, there will always be a point where one user in an organisation has clicked on an email link or somehow inadvertently kicked off the journey of the virus across their network.
Officials from West Bengal State Electricity Distribution Company (WBSEDCL) confirmed the development and said it has been detected at four offices in West Midnapore district affecting PCs in four blocks of Belda, Datan, Narayngarh and Keshiyari.
Once inside a network the virus can then spread to other connected computers.
“In particular, making sure that our data is properly backed up and making sure that we are using the software patches, the anti-virus patches, that are sent out regularly by manufacturers”.
The most recent ransomware attack occurred this past Friday and continues into this week.
Hull and East Yorkshire Hospitals NHS Trust were also targeted on Friday but a spokesman said its IT department managed to prevent any significant impact.
“It is important to note that the vast majority of NHS organisations report that they are running contemporary IT systems, which are commissioned depending on local need”, the NHS said in a statement.
Doctors surgeries in Tayside affected by the UK-wide NHS cyber-attack are now “operating as normal”. “It was clear (that) warnings were given to hospital trusts”.
But security minister Ben Wallace said the Government had put £1.2 billion into combating cyber attacks during the last strategic defence and security review, including a £50 million pot to support NHS IT networks.
A poll on Monday found three-quarters of Britons thought the NHS was in a bad condition and more than 50 per cent blamed the Conservatives for its current woes.
The UK government called a meeting of its crisis response committee, known as Cobra, to discuss how to handle the situation.