A squad of cybersecurity firms have tracked a ransomware threat spreading across the internet known as Ryuk, which has collected over 705 BTC in just five months, estimated to be worth the equivalent of $3.7 million. Using email phishing campaigns to inject tens of thousands of victims with a banking Trojan called TrickBot, ransomers later hand-picked infected machines believed to be owned by large companies or government organizations on which to deploy Ryuk, ZDNet reports. Once the high-profile machines are selected, Ryuk encrypts all of the targets’ hard drives, locking data until victims contact the hackers and pay a Bitcoin ransom. While…

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