WannaCry is so-called crypto-ransom ware that encrypts and makes inaccessible files on a computer until a ransom is paid by an individual or company.

The cybercrime unit of Europol says the current attack has reached at an “unprecedented level.”

While ransomware attacks have existed for many years, they’ve reached “a new level of maturity and menace,” according to a report last year by software security giant Symantec.

 

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