An analysis of new samples of BlackMatter ransomware for Windows and Linux has revealed the extent to which the operators have continually added new features and encryption capabilities in successive iterations over a three-month period. No fewer than 10 Windows and two Linux versions of the ransomware have been observed in the wild to date, Group-IB threat researcher Andrei Zhdanov said in a report shared with The Hacker News, pointing out the changes in the implementation of the ChaCha20 encryption algorithm used to encrypt the contents of the files.

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