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Written by May 19, 2026

security: Exposing Fox Tempest: A malware-signing service operation

May 19, 2026

Microsoft says Fox Tempest is a financially motivated threat actor running a malware-signing-as-a-service operation used by other cybercriminals to help distribute malicious code, including ransomware. The service has been linked to groups such as Vanilla Tempest and Storm.

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