The Microsoft Defender Security Research Team uncovered a sophisticated macOS intrusion campaign attributed to the North Korean threat actor Sapphire Sleet that abuses user driven execution and social engineering to bypass macOS security protections and steal credentials, cryptocurrency assets, and…
Category: Microsoft Security Blog
Incident response for AI: Same fire, different fuel
AI changes how incidents unfold and how we respond. Learn which IR practices still apply and where new telemetry, tools, and skills are needed. The post Incident response for AI: Same fire, different fuel appeared first on Microsoft Security Blog.…
The agentic SOC—Rethinking SecOps for the next decade
In the SOC of the future, autonomous defense moves at machine speed, agents add context and coordination, and humans focus on judgment, risk, and outcomes. The post The agentic SOC—Rethinking SecOps for the next decade appeared first on Microsoft Security…
Investigating Storm-2755: “Payroll pirate” attacks targeting Canadian employees
Microsoft Incident Response – Detection and Response Team (DART) researchers observed an emerging, financially motivated threat actor, tracked as Storm-2755, compromising Canadian employee accounts to gain unauthorized access to employee profiles and divert salary payments to attacker-controlled accounts. The post…
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. Microsoft researchers detail how the flaw works, why it matters, and how developers can mitigate similar risks by updating affected SDKs. The…
SOHO router compromise leads to DNS hijacking and adversary-in-the-middle attacks
Executive summary Forest Blizzard, a threat actor linked to the Russian military, has been compromising insecure home and small-office internet equipment like routers, then modifying their settings in ways that turn them into part of the actor’s malicious infrastructure. The…
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. This campaign goes beyond traditional phishing by generating live authentication codes on demand, enabling higher success rates and sustained post‑compromise…
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 (Gaze.exe). The post Storm-1175 focuses gaze on vulnerable web-facing assets in high-tempo 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. This post examines how this tradecraft conceals execution behind specially crafted HTTP cookies. The post Cookie-controlled PHP webshells: A stealthy tradecraft in Linux…
Threat actor abuse of AI accelerates from tool to cyberattack surface
Generative AI is upgrading cyberattacks, from 450% higher phishing click‑through rates to industrialized MFA bypass. The post Threat actor abuse of AI accelerates from tool to cyberattack surface appeared first on Microsoft Security Blog. This article has been indexed from…
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 (1.14.1 and 0.30.4) to download from command and control (C2) that Microsoft Threat Intelligence has attributed to…
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. The attack leverages renamed Windows tools and cloud-hosted payloads to install MSI backdoors and maintain persistent access to compromised systems. The post WhatsApp malware…
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. The post Applying security fundamentals to AI: Practical advice for CISOs appeared first on Microsoft Security Blog. This article has been…
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. The post The threat to critical infrastructure has changed. Has your readiness? appeared first on Microsoft…
WhatsApp malware campaign delivers VBS payloads and MSI backdoors
A malware campaign uses WhatsApp messages to deliver VBS scripts that initiate a multi-stage infection chain. The attack leverages renamed Windows tools and cloud-hosted payloads to install MSI backdoors and maintain persistent access to compromised systems. The post WhatsApp malware…
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. The post Addressing the OWASP Top 10 Risks in Agentic AI with Microsoft Copilot Studio appeared…
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. Microsoft Defender applies asset-aware protection using Microsoft Security Exposure Management to detect and block threats against these critical systems. This article explores real-world attack…
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. The post Identity security is the new pressure point for modern cyberattacks appeared first on Microsoft Security Blog. This…
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. This analysis walks through the Trivy supply‑chain compromise, attacker techniques, and concrete steps security teams can take to detect and defend against similar attacks. The…
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. The post Governing AI agent behavior: Aligning user, developer, role, and organizational intent appeared first on Microsoft Security Blog. This article…