Intent redirection vulnerability in third-party SDK exposed millions of Android wallets to potential risk
A severe Android intent‑redirection vulnerability in a widely deployed SDK exposed sensitive user data across millions of apps.
Actionable threat insights
Get timely insights into emerging vulnerabilities, first‑finder discoveries, and evolving cyberattacker behaviors. Explore deep research and real‑world Microsoft Defender scenarios that show how proactive detection and quick action help organizations prevent compromise.
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Inside an AI‑enabled device code phishing campaign
A new wave of device code phishing shows how threat actors are scaling account compromise using AI and end‑to‑end automation. -
Storm-1175 focuses gaze on vulnerable web-facing assets in high-tempo Medusa ransomware operations
The financially motivated cybercriminal threat actor Storm-1175 operates high-velocity ransomware campaigns that weaponize recently disclosed vulnerabilities to obtain initial access, exfiltrate data, and deploy Medusa ransomware. -
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. Retain Microsoft Security Experts
Microsoft Security Experts are now available to strengthen your team with managed security services. Learn how to defend against threats with security experts.
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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. -
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. -
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. -
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. 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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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. -
When tax season becomes cyberattack season: Phishing and malware campaigns using tax-related lures
During tax season, threat actors reliably take advantage of the urgency and familiarity of time-sensitive emails, including refund notices, payroll forms, filing reminders, and requests from tax professionals, to push malicious attachments, links, or QR codes. -
Observability for AI Systems: Strengthening visibility for proactive risk detection
As AI systems grow more autonomous, observability becomes essential.
