The importance of hardening customer support tools against cyberattacks

The Deputy CISO blog series is whereMicrosoft Deputy Chief Information Security Officers CISOs share their thoughts on what is most important in their respective domains. In this series, you will get practical advice, tactics to start and stop deploying, forward-looking commentary on where the...

Securing agentic AI: Your guide to the Microsoft Ignite sessions catalog

Security is a core focus at Microsoft Ignite 2025, reflected in dedicated sessions and hands-on experiences designed for security professionals and leaders. Whether you’re shaping strategy or working on the front lines, Microsoft Ignite offers direct access to the latest advancements and practica...

Inside Microsoft Threat Intelligence: Calm in the chaos

Leading Through the Worst Day Incident response is never orderly. Threat actors don’t wait. Environments are compromised. Data is missing. Confidence is shaken. But for Microsoft’s Incident Response IR team, that chaos is exactly where the work begins. In Episode 1, we showed how Microsoft Threat...

Cybersecurity Awareness Month: Security starts with you

At Microsoft, security is our number one priority, and we believe that cybersecurity is as much about people as it is about technology. As we move into October and kick off Cybersecurity Awareness Month, this time of year really makes me think about how important online safety is—not just at work...

Empowering defenders in the era of agentic AI with Microsoft Sentinel

Microsoft unveils a new wave of security innovation—delivering an agentic platform to protect organizations at scale We are living through a turning point in how organizations work and defend themselves. Across industries, “Frontier Firms” are emerging; these are businesses where humans and AI...

AI vs. AI: Detecting an AI-obfuscated phishing campaign

Microsoft Threat Intelligence recently detected and blocked a credential phishing campaign that likely used AI-generated code to obfuscate its payload and evade traditional defenses. Appearing to be aided by a large language model LLM, the activity obfuscated its behavior within an SVG file,...

Microsoft Purview innovations for your Fabric data: Unify data security and governance for the AI era

The Microsoft Fabric and Purview teams are thrilled to participate in the European Microsoft Fabric Community Conference September 15-18, 2025, in Vienna, Austria. This event is Microsoft’s largest tech conference in Europe, where data professionals gather to connect and share insights on data,...

Azure mandatory multifactor authentication: Phase 2 starting in October 2025

As cyberattacks become increasingly frequent, sophisticated, and damaging, safeguarding your digital assets has never been more critical, and at Microsoft, your security is our top priority. Microsoft research shows that multi-factor authentication MFA can block more than 99.2% of account...

Storm-0501’s evolving techniques lead to cloud-based ransomware

Microsoft Threat Intelligence has observed financially motivated threat actor Storm-0501 continuously evolving their campaigns to achieve sharpened focus on cloud-based tactics, techniques, and procedures TTPs. While the threat actor has been known for targeting hybrid cloud environments, their...

Quantum-safe security: Progress towards next-generation cryptography

Quantum computing promises transformative advancements, yet it also poses a very real risk to today’s cryptographic security. In the future scalable quantum computing could break public-key cryptography methods currently in use and undermine digital signatures, resulting in compromised...

Microsoft Sentinel data lake: Unify signals, cut costs, and power agentic AI

You can’t protect what you can’t see. Security operations teams have long been faced with the challenge of managing massive, fast-growing datasets, and the cost of scaling traditional data management tools to handle these data volumes has become unsustainable. We’re evolving our industry-leading...

Improving IT efficiency with Microsoft Security Copilot in Microsoft Intune and Microsoft Entra

When Microsoft introduced Microsoft Security Copilot last year, our vision was to empower organizations with generative AI that helps security and IT teams simplify operations and respond faster. Since then, we’ve continuously innovated and learned alongside our customers. They consistently tell ...

Meet the Deputy CISOs who help shape Microsoft’s approach to cybersecurity: Part 3

Microsoft launched its Cybersecurity Governance Council in 2024, and with it, named a group of deputy chief information security officers that ensure comprehensive oversight of the company’s cybersecurity risk, defense, and compliance. These leaders work in tandem with product and engineering...

14 secure coding tips: Learn from the experts at Microsoft Build

Hey friends! If you are a developer, you know that writing clean and efficient code is just the starting point. Now, with AI playing a bigger role, secure coding isn't just a 'nice-to-have'—it's a must. Whether you're building web apps, working on cloud services, or adding AI to your projects,...

How MSRC coordinates vulnerability research and disclosure while building community

In an era where discovering and rapidly mitigating security vulnerabilities is more important than ever before, the Microsoft Security Response Center MSRC is at the center of this work. MSRC focuses on investigating vulnerabilities, coordinating their disclosure, and releasing security updates t...

Windows 11 enables security by design from the chip to the cloud

Over the last year, PCs have kept us connected to family, friends, and enabled businesses to continue to run. This new hybrid work paradigm has got us thinking about how we will continue to deliver the best possible quality, experience, and security for the more than 1 billion people who use...

Protecting Microsoft at AI speed: How SFI proactively hardens our cloud

AI models have reached a threshold where they exhibit expert-level capabilities in vulnerability discovery, exploit chaining, and proof-of-concept generation. As AI-powered vulnerability discovery matures, every organization that builds or runs software at scale needs continuous proactive...

Email threat landscape: Q1 2026 trends and insights

In this article 1. Tycoon2FA disruption impact 2. QR code phishing attacks 3. CAPTCHA tactics 4. Malicious payloads 5. Business email compromise 6. Defending against email threats 7. Microsoft Defender detections During the first quarter of 2026 January-March, Microsoft Threat Intelligence detect...

Incident response for AI: Same fire, different fuel

In this article 1. The fundamentals still hold 2. Where AI changes the equation 3. Closing the gaps in telemetry, tooling, and response 4. The human dimension 5. Looking ahead When a traditional security incident hits, responders replay what happened. They trace a known code path, find the defect...

Threat actor abuse of AI accelerates from tool to cyberattack surface

For the last year, one word has represented the conversation living at the intersection of AI and cybersecurity: speed. Speed matters, but it’s not the most important shift we are observing across the threat landscape today. Now, threat actors from nation states to cybercrime groups are embedding...

Cookie-controlled PHP webshells: A stealthy tradecraft in Linux hosting environments

In this article 1. Cookie-controlled execution behavior 2. Observed variants of cookie-controlled PHP web shells 3. Mitigation and protection guidance 4. Microsoft Defender XDR detections 5. Microsoft Security Copilot prompts 6. Microsoft Defender XDR threat analytics 7. MITRE ATT&CK™ Techniques...

The threat to critical infrastructure has changed. Has your readiness?

Critical infrastructure CI organizations underpin national security, public safety, and the economy. In 2026, the cyber threat landscape facing these sectors is structurally different than it was even two years ago. What Microsoft Threat Intelligence is observing across critical infrastructure...

Guidance for detecting, investigating, and defending against the Trivy supply chain compromise

In this article 1. Analyzing the Trivy supply chain compromise 2. Detection and investigation 3. Mitigation and protection guidance 4. Advanced hunting queries 5. References 6. Learn more On March 19, 2026, Trivy, Aqua Security’s widely used open-source vulnerability scanner, was reported to have...

When tax season becomes cyberattack season: Phishing and malware campaigns using tax-related lures

In this article 1. A wide range of tax-themed campaigns 2. How to protect users and organization against tax-themed campaigns 3. Microsoft Defender detection and hunting guidance 4. Indicators of compromise During tax season, threat actors reliably take advantage of the urgency and familiarity of...

Manipulating AI memory for profit: The rise of AI Recommendation Poisoning

That helpful "Summarize with AI" button? It might be secretly manipulating what your AI recommends. Microsoft security researchers have discovered a growing trend of AI memory poisoning attacks used for promotional purposes, a technique we call AI Recommendation Poisoning. Companies are embedding...

Microsoft SDL: Evolving security practices for an AI-powered world

As AI reshapes the world, organizations encounter unprecedented risks, and security leaders take on new responsibilities. Microsoft’s Secure Development Lifecycle SDL is expanding to address AI-specific security concerns in addition to the traditional software security areas that it has...

Turning threat reports into detection insights with AI

Security teams routinely need to transform unstructured threat knowledge, such as incident narratives, red team breach-path writeups, threat actor profiles, and public reports into concrete defensive action. The early stages of that work are often the slowest. These include extracting tactics,...

New Microsoft Data Security Index report explores secure AI adoption to protect sensitive data

Generative AI and agentic AI are redefining how organizations innovate and operate, unlocking new levels of productivity, creativity and collaboration across industry teams. From accelerating content creation to streamlining workflows, AI offers transformative benefits that empower organizations ...

Security strategies for safeguarding governmental data

The Deputy CISO blog series is where Microsoft Deputy Chief Information Security Officers CISOs share their thoughts on what is most important in their respective domains. In this series, you will get practical advice, tactics to start and stop deploying, forward-looking commentary on where the...

A new era of agents, a new era of posture

The rise of AI Agents marks one of the most exciting shifts in technology today. Unlike traditional applications or cloud resources, these agents are not passive components- they reason, make decisions, invoke tools, and interact with other agents and systems on behalf of users. This autonomy...

How Microsoft builds privacy and security to work hand-in-hand

The Deputy CISO blog series is where Microsoft Deputy Chief Information Security Officers CISOs share their thoughts on what is most important in their respective domains. In this series, you will get practical advice, tactics to start and stop deploying, forward-looking commentary on where the...

Introducing the Microsoft Defender Experts Suite: Elevate your security with expert-led services

Security teams are being pushed to their limits as AI‑powered cyberattacks grow in speed, scale, and sophistication—and only 14% of organizations surveyed by the World Economic Forum report they feel confident they have the right people and skills needed to meet their cybersecurity objectives.1 A...

Access Fabric: A modern approach to identity and network access

Today, most organizations use multiple identity systems and multiple network access solutions from multiple vendors. This happens, either intentionally or organically, when different areas of a company choose different tools, creating a fragmented environment that leaves weaknesses that...

Clarity in complexity: New insights for transparent email security

As email threats grow more sophisticated and layered security architectures become more common, organizations need clear, data-driven insights to evaluate how their security solutions perform together. Benchmarking plays a critical role in helping security leaders understand not just individual...

Stronger together: New Beazley collaboration enhances cyber resilience

Today’s cyberthreat landscape demands more than technical expertise: it requires a unified response team of technical responders, insurers, brokers, and legal counsel. This integrated approach is key to building long-term cyber resilience to help your organization anticipate, withstand, recover...

How to build forward-thinking cybersecurity teams for tomorrow

We are witnessing something unprecedented in cybersecurity: the democratization of advanced cyberattack capabilities. What once required nation-state resources sophisticated social engineering, polymorphic malware, coordinated infrastructure now fits in a prompt window. AI is no longer a futurist...

Microsoft named a Leader in the Gartner® Magic Quadrant™ for Access Management for the ninth consecutive year

I'm deeply grateful to our customers and partners for their continued trust and collaboration. We’re happy to share that Microsoft has been recognized as a Leader in the 2025 Gartner® Magic Quadrant™ for Access Management for the ninth consecutive year. We feel this recognition underscores the...

Microsoft named a Leader in the Gartner® Magic Quadrant™ for Access Management for the ninth consecutive year

I'm deeply grateful to our customers and partners for their continued trust and collaboration. We’re happy to share that Microsoft has been recognized as a Leader in the 2025 Gartner® Magic Quadrant™ for Access Management for the ninth consecutive year. We feel this recognition underscores the...

​​Ambient and autonomous security for the agentic era​​

Over the past year, I've had countless conversations with customers who are striving to unlock human ambition with AI. They are on their journey to become Frontier Firms, where humans and agents push the boundaries of innovation and create new possibilities, empowering humans to become limitless...

Collaborative research by Microsoft and NVIDIA on real-time immunity

AI-Powered Threats Demand AI-Powered Defense While AI supports growth and innovation, it is also reshaping how organizations address faster, more adaptive security risks. AI-driven security threats, including “vibe-hacking”, are evolving faster than traditional defenses can adapt. Attackers can n...

​​Whisper Leak: A novel side-channel attack on remote language models

Microsoft has discovered a new type of side-channel attack on remote language models. This type of side-channel attack could allow a cyberattacker a position to observe your network traffic to conclude language model conversation topics, despite being end-to-end encrypted via Transport Layer...

​​Securing critical infrastructure: Why Europe’s risk-based regulations matter

The Deputy CISO blog series is where Microsoft Deputy Chief Information Security Officers CISOs share their thoughts on what is most important in their respective domains. In this series, you will get practical advice, tactics to start and stop deploying, forward-looking commentary on where the...

​​Learn what generative AI can do for your security operations center

The busier security teams get, the harder it can be to understand the full impact of false positives, queue clutter, tool fragmentation, and more. But what is clear—it all adds up to increased fatigue and an increased potential to miss the cyberthreats that matter most. To help security teams...

Harden your identity defense with improved protection, deeper correlation, and richer context

In today’s digital-first enterprise, identities have become the new corporate security perimeter. Hybrid work and cloud-first strategies have dissolved traditional network boundaries and dramatically increased the complexity of identity fabrics. Security teams are left managing a constellation of...

Microsoft named a Leader in the 2025 Gartner® Magic Quadrant™ for SIEM

We’re honored to share that Microsoft has again been recognized as a Leader in the2025 Gartner® Magic Quadrant™ for Security Information and Event Management SIEM.1 We believe this recognition reinforces Microsoft Sentinel's position as an industry-leading, cloud and AI-powered SIEM—designed to...

Building a lasting security culture at Microsoft

At Microsoft, building a lasting security culture is more than a strategic priority—it is a call to action. Security begins and ends with people, which is why every employee plays a critical role in protecting both Microsoft and our customers. When secure practices are woven into how we think,...

Microsoft named a Leader in the IDC MarketScape for XDR

When cybersecurity stakes are high and complexity is the norm, Microsoft doesn’t just participate, it excels with Microsoft Defender XDR—built to anticipate, disrupt, and outpace modern cyberthreats. We are excited to announce that Microsoft has been named a Leader in the IDC MarketScape: Worldwi...

Azure mandatory multifactor authentication: Phase 2 starting in October 2025

As cyberattacks become increasingly frequent, sophisticated, and damaging, safeguarding your digital assets has never been more critical, and at Microsoft, your security is our top priority. Microsoft research shows that multi-factor authentication MFA can block more than 99.2% of account...

Dissecting PipeMagic: Inside the architecture of a modular backdoor framework

Among the plethora of advanced attacker tools that exemplify how threat actors continuously evolve their tactics, techniques, and procedures TTPs to evade detection and maximize impact, PipeMagic, a highly modular backdoor used by Storm-2460 masquerading as a legitimate open-source ChatGPT Deskto...

Connect with the security community at Microsoft Ignite 2025

In today’s AI-powered world, security professionals are facing unprecedented challenges—and opportunities. As generative AI reshapes the digital landscape, the need for robust, intelligent, and adaptive security strategies has never been more urgent. At Microsoft Ignite 2025, we will showcase...