Microsoft has successfully disrupted a major cyberattack campaign orchestrated by the Vanilla Tempest threat group in early October 2025. The tech giant revoked over 200 fraudulent certificates that the cybercriminals had used to sign fake Microsoft Teams installation files, which were designed to deliver the Oyster backdoor and deploy Rhysida ransomware on victim systems. Discovery […]

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Source: gbHackers
Source Link: https://gbhackers.com/microsoft-halts-vanilla-tempest-cyberattack/