Onyx is a ransomware group that first appeared in April 2022, operating with the primary motivation of financial profit through file encryption and data exfiltration for ransom. The group is notable for consistently employing double extortion tactics, threatening public release of sensitive victim data if ransom demands are not fulfilled. Onyx has shown an evolving operational posture, moving towards incorporating zero-day vulnerabilities into its campaigns and refining its attack methods to avoid detection.

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