Dossier
Maurice Mason
Coverage of Maurice Mason in the Nexus archive.
- Microsoft disrupts cybercrime service that abused software verification systems en masse
Microsoft disrupted a cybercrime service called Fox Tempest that created and sold code-signing certificates to make malware appear legitimate. The service was used by multiple ransomware groups and had a global impact. Microsoft seized infrastructure and dismantled the operation after tracking it since September 2025.