The cyberattack and extortion campaign was discovered by researchers at cybersecurity firm Cyphort. The hackers are demanding money to unlock computers infected with their malware.
It's unclear how many computers were infected. The attack appears to have only affected people running Windows PCs using outdated browsers, including Internet Explorer 8 -- the most-used version of Microsoft's IE browser. Modern, updated browsers such as Internet Explorer 11, Google Chrome and Mozilla's latest version of Firefox were not susceptible to the malware.
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