Reports indicate the cyber attack has affected more than 200,000 organizations in about 150 countries.
Australian organisations will return to work as the local fallout from the weekend's global cyber attack becomes clearer.
The ransomware is called "Wannacry" and locks up your computer and forces you to pay the hackers to get all your stuff back - probably making you want to cry in the process.
The indiscriminate attack began Friday and struck banks, hospitals and government agencies, exploiting known vulnerabilities in older Microsoft computer operating systems.
The U.S. was mostly saved when a kill switch stopped the malware from spreading.
The spokesman for Dorset CCG said: "We are pleased to confirm that the Ransomware attack has had little impact on the health community in Dorset, however we continue to be vigilant".
Thousands of computers and other Microsoft-based systems in Europe and Russian Federation had already fallen victim to the ransomware attack, reported ABC News.More news: ASUS Zenfone AR to be officially launched this summer
More news: Hardline Prosecutor Mounts Strong Challenge to Iran's Rouhani
More news: When a young Zuckerberg received his acceptance letter from Harvard
The cyber attack which hit the NHS was a ransomware attack which encrypts files on a user's computer, blocking them from view and threatening to delete them unless a payment is made. In China, universities and other educational institutions were hardest hit because they have older computers and are slow to update their operating systems and security.
The minister assisting the prime minister for cyber security, Dan Tehan, said that government agencies and the nation's critical infrastructure have not been affected by the malware campaign. The Dutch police therefore advise all Dutch computer users to make sure that they are protected against ransomware by installing all updates instantly, using an anti-virus program and regularly backing up the data on their computers.
She said Britain was working with worldwide partners in the global manhunt to find the creators of the cyber attack.
The attack, caused by ransomware, resulted in a widespread breakdown of the NHS.
"The affected company doesn't fall under critical infrastructure, it's not a medical or health service and it is not a big company", he said.
We are obviously working with that business the Australian Cyber Security Centre is engaging with them'.
Microsoft released patches last month and on Friday to fix a vulnerability that allowed the worm to spread across networks.