Emergence of New Ransomware Variants: Bactor, ChickenKiller, and Midnight

Emergence of New Ransomware Variants: Bactor, ChickenKiller, and Midnight

First seen 2 Dec 2025, 18:33 UTC •CyfirmaScworld •22.0

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Multiple ransomware strains, including Bactor, ChickenKiller, and Midnight, have been identified by CYFIRMA Research and Norton. Bactor and ChickenKiller ransomware target Windows systems, while Midnight ransomware has been partially decrypted due to a vulnerability in its encryption. Organizations across various industries are at risk from these evolving threats.

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