A threat actor targeting Microsoft 365 and Azure production environments is stealing data in attacks that abuse legitimate applications and administration features.

Microsoft disrupted Fox Tempest, a malware-signing service accused of abusing Azure certificates to disguise ransomware and ...

Microsoft Threat Intelligence presents a comprehensive analysis of The Gentlemen, a Go-based ransomware deployed by ...

Microsoft has identified an active supply chain attack targeting the npm package ecosystem. On May 28, 2026, a single threat actor operating under the newly created maintainer alias vpmdhaj (a39155771 ...