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What is the 'ransomware' WannaCry worm?

Malicious software called 'ransomware' has forced British hospitals to turn away patients

Photo: iStock
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Researchers at BAE Systems and Symantec say that some of the software and internet infrastructure in the global effort was also used in the Sony attack. Photo: iStock

Jamillah Knowles | Reuters London
Malicious software called “ransomware” has forced British hospitals to turn away patients and affected Spanish companies as part of a global outbreak that has affected tens of thousands of computers.
 
How does it work?
 
WannaCry is a form of “ransomware” that locks up the files on your computer and encrypts them in a way that you cannot access them anymore.
 
How does it spread?
 
Ransomware is a program that gets into your computer, either by clicking on the wrong thing or downloading the wrong thing, and then it holds something you need to ransom.
 
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