Biggest ransomware outbreak in history hits nearly 100 countries with data held for ransom
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Dozens of countries have been hit with a huge cyber extortion attack that locked computers and held users' files for ransom at a multitude of hospitals, companies and government agencies. The attack appeared to be caused by a self-replicating piece of software that takes advantage of vulnerabilities in older versions of Microsoft Windows, security experts say. It spreads from computer to computer as it finds exposed targets.