Cookie-controlled PHP webshells: A stealthy tradecraft in Linux hosting environments
Cookie-gated PHP webshells use obfuscation, php-fpm execution, and cron-based persistence to evade detection in Linux hosting environments.
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Retain Microsoft Defender Experts
Microsoft Defender Experts are available to strengthen your teams with expertise when and where you need it. Learn how to elevate your security with expert-led services.
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Mitigating the Axios npm supply chain compromise
On March 31, 2026, the popular HTTP client Axios experienced a supply chain attack, causing two newly published npm packages for version updates to download from command and control (C2) that Microsoft Threat Intelligence has attributed to the North Korean state actor Sapphire Sleet. -
The threat to critical infrastructure has changed. Has your readiness?
Five facts critical infrastructure (CI) leaders need to act on in 2026, grounded in what Microsoft Threat Intelligence is observing across sectors right now. -
Applying security fundamentals to AI: Practical advice for CISOs
Read actionable advice for CISOs on securing AI, managing risk, and applying core security principles in today’s AI‑powered environment. Modernize your Security Operations Center with Microsoft Sentinel
Microsoft Sentinel is a cloud-native SIEM solution powered by AI and automation that delivers intelligent security analytics across your entire enterprise.
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WhatsApp malware campaign delivers VBScript and MSI backdoors
A malware campaign uses WhatsApp messages to deliver VBS scripts that initiate a multi-stage infection chain. -
Addressing the OWASP Top 10 Risks in Agentic AI with Microsoft Copilot Studio
Agentic AI introduces new security risks. Learn how the OWASP Top 10 Risks for Agentic Applications maps to real mitigations in Microsoft Copilot Studio. -
How Microsoft Defender protects high-value assets in real-world attack scenarios
High-value assets including domain controllers, web servers, and identity infrastructure are frequent targets in sophisticated attacks. -
Identity security is the new pressure point for modern cyberattacks
Read the latest Microsoft Secure Access report for insights into why a unified identity and access strategy offers strong modern protection. Tailored AI insights from Microsoft Security Copilot
Empower your defenders to detect hidden patterns, harden defenses, and respond to incidents faster with generative AI.
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Guidance for detecting, investigating, and defending against the Trivy supply chain compromise
Threat actors abused trusted Trivy distribution channels to inject credential‑stealing malware into CI/CD pipelines worldwide. -
Governing AI agent behavior: Aligning user, developer, role, and organizational intent
This research report explores the layers of agent intent and how to align them for secure enterprise AI adoption. -
Case study: How predictive shielding in Defender stopped GPO-based ransomware before it started
Microsoft Defender stopped a human-operated ransomware attack that abused Group Policy Objects (GPOs) to disable defenses and push encryption at scale. -
CTI-REALM: A new benchmark for end-to-end detection rule generation with AI agents
Excerpt: CTI-REALM is Microsoft’s open-source benchmark for evaluating AI agents on real-world detection engineering—turning cyber threat intelligence (CTI) into validated detections.
