“Microsoft Trusted Signing certificates are issued with a 72-hour validity period. After that, the certificates expire and need to be renewed. This short period makes the standard process of purchasing …
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Rhysida
Safety & Security
Microsoft Revokes 200 Fraudulent Certificates Used in Rhysida Ransomware Campaign
by David Walker
Oct 17, 2025Ravie LakshmananMalware / Cybercrime Microsoft on Thursday disclosed that it revoked more than 200 certificates used by a threat actor it tracks as Vanilla Tempest to fraudulently sign …