Microsoft Security Blog
Your source for the latest in cybersecurity
Beyond the benchmark: Advancing security at AI speed
Read how Microsoft Security has advanced its agentic vulnerability detection system, codename MDASH, integrating into real-world workflows across Windows, Azure, and identity systems.
Microsoft Build 2026: Securing code, agents, and models across the development lifecycle
Discover how Microsoft enables fast, secure AI development with MDASH and new security capabilities.
What’s new in Microsoft Security: May 2026
Microsoft Security’s latest updates extend visibility, control, and protection across expanding ecosystems as organizations accelerate AI adoption.
Microsoft is named a Leader in the 2026 Gartner® Magic Quadrant™ for Endpoint Protection
Microsoft is named a Leader in the 2026 Gartner® Magic Quadrant™ for Endpoint Protection.
What’s new in Microsoft Security: May 2026
Microsoft Security’s latest updates extend visibility, control, and protection across expanding ecosystems as organizations accelerate AI adoption.
Microsoft is named a Leader in the 2026 Gartner® Magic Quadrant™ for Endpoint Protection
Microsoft is named a Leader in the 2026 Gartner® Magic Quadrant™ for Endpoint Protection.
Microsoft recognized as a Leader in The Forrester Wave™ for Workforce Identity Security Platforms
Microsoft has been recognized as a Leader in The Forrester Wave™: Workforce Identity Security Platforms, Q2 2026, receiving the highest scores in both the current offering and strategy categories.
Securing our future: April 2025 progress report on Microsoft’s Secure Future Initiative
The Microsoft Secure Future Initiative (SFI) stands as the largest cybersecurity engineering project in history and most extensive effort of its kind at Microsoft.
New whitepaper outlines the taxonomy of failure modes in AI agents
Read the new whitepaper from the Microsoft AI Red Team to better understand the taxonomy of failure mode in agentic AI.
Microsoft extends Zero Trust to secure the agentic workforce
At Microsoft Build 2025, we’re taking important steps to secure the agentic workforce.
Threat intelligence
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AI brands as bait: How threat actors are using the AI hype in social engineering
As threat actors operationalize AI to accelerate attacks, they are also leveraging the wider global interest around AI itself as a social engineering lure. -
The Gentlemen ransomware: Dissecting a self-propagating Go encryptor
Microsoft Threat Intelligence presents a comprehensive analysis of The Gentlemen, a Go-based ransomware deployed by affiliates of Storm-2697 that combines per-file ephemeral key encryption with an aggressive self-propagation module to deploy itself across an entire network using series of simultaneous lateral movement techniques per target. -
Exposing Fox Tempest: A malware-signing service operation
Fox Tempest is a financially motivated threat actor operating a malware‑signing‑as‑a‑service (MSaaS) used by other cybercriminals, including Vanilla Tempest and Storm groups, to more effectively distribute malicious code, including ransomware.
Stay ahead of threats
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AI and machine learning
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Beyond the benchmark: Advancing security at AI speed
Read how Microsoft Security has advanced its agentic vulnerability detection system, codename MDASH, integrating into real-world workflows across Windows, Azure, and identity systems. -
AI is accelerating cyberattacks—here’s how to stay ahead
See how Microsoft unifies identity and security signals to help teams prevent, detect, and respond to AI-accelerated attacks faster. -
Reconstructing AI activity in investigations
Learn how to investigate AI activity in Microsoft 365 Copilot and Azure AI services using a structured, telemetry-driven approach.
Modernize your security operations center
Confidently secure your multicloud, multiplatform environment with Microsoft Sentinel – a cloud-native security information and event management (SIEM) solution.
Latest posts
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From package to postinstall payload: Inside the Mastra npm supply chain compromise
A poisoned npm package infected 140+ projects with a hidden payload. -
Crypto Clipper uses Tor and worm-like propagation for persistence and control
Microsoft Threat Intelligence analyzed a cryptocurrency clipper campaign that combines clipboard theft, wallet replacement, Tor-based communications, and worm-like propagation. -
Beyond the benchmark: Advancing security at AI speed
Read how Microsoft Security has advanced its agentic vulnerability detection system, codename MDASH, integrating into real-world workflows across Windows, Azure, and identity systems. -
Forrester names Microsoft a Leader in the 2026 Extended Detection and Response Platforms Wave™ report
Microsoft has been named a Leader in The Forrester Wave™: Extended Detection and Response Platforms, Q2 2026. -
AI is accelerating cyberattacks—here’s how to stay ahead
See how Microsoft unifies identity and security signals to help teams prevent, detect, and respond to AI-accelerated attacks faster. -
Microsoft Defender email security benchmarking: Key insights from one year of data
See how Microsoft Defender performed in one year of real-world email security benchmarking against SEG and ICES vendors.