Azure LoLBins: Protecting against the dual use of virtual machine extensions

Azure Defender for Resource Manager offers unique protection by automatically monitoring the resource management operations in your organization, whether theyre performed through the Azure portal, Azure REST APIs, Azure CLI, or other Azure programmatic clients. In this blog, we will look into the...

Guiding principles of our identity strategy: staying ahead of evolving customer needs

Last June, when I shared the 5 principles driving a customer-obsessed identity strategy at Microsoft, many of you had embraced the idea of a boundaryless environment, but relatively few had implemented it in practice. A global pandemic made remote access essential and forced many of you to...

Updates for Microsoft 365 help strengthen data privacy

As data continues to grow exponentially and travel across organizational boundaries, privacy and compliance professionals play an increasingly strategic role within organizations. Several updates—announced today—for Microsoft 365 provide organizations with more control and options to strengthen...

Secure access to your enterprise with Microsoft 365 Enterprise E5

Most lessons in cybersecurity are born out of necessity. In this case, it was my need for a haircut. Last weekend, I was reminded why it’s time to rethink the conventional wisdom about secure passwords and user access. I was making an appointment online and at the very end of the process, the...

Announcing new capabilities for the Microsoft Azure Security Center

Microsoft Azure Security Center—the central hub for monitoring and protecting against related incidents within Azure—has released new capabilities. The following features—announced at Hannover Messe 2019—are now generally available for the Azure Security Center: Advanced Threat Protection for Azu...

The evolution of Microsoft Threat Protection, February update

February is an exciting month of enhancements for Microsoft Threat Protection. For those who have followed our monthly updates November, December, and January, you’re aware that Microsoft Threat Protection helps provide users optimal security from the moment they sign in, use email, work on...

A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017

Adopting reliable attack methods and techniques borrowed from more evolved threat types, ransomware attained new levels of reach and damage in 2017. The following trends characterize the ransomware narrative in the past year: Three global outbreaks showed the force of ransomware in making...

Chromium extension uses AI‑related branding to redirect browser search

In this article 1. Extension overview 2. Key indicators of malicious behavior 3. Dynamic analysis findings 4. Mitigation and protection guidance 5. References 6. Learn more Microsoft Threat Intelligence has identified a malicious Chromium-based extension that spoofs the AI-powered answer engine...

Updating the taxonomy of failure modes in agentic AI systems: What a year of red teaming taught us

In this article 1. Why the Taxonomy Needed Updating 2. Seven new failure modes 3. Operational findings: What red teaming showed 4. New mitigations 5. What to do this quarter When the Microsoft AI Red Team published the Taxonomy of Failure Modes in Agentic AI Systems in April 2025, the goal was a...

Storm-1175 focuses gaze on vulnerable web-facing assets in high-tempo Medusa ransomware operations

In this article 1. Storm-1175’s rapid attack chain: From initial access to impact 2. Mitigation and protection guidance 3. Microsoft Defender detections 4. Indicators of compromise The financially motivated cybercriminal actor tracked by Microsoft Threat Intelligence as Storm-1175 operates...

WhatsApp malware campaign delivers VBScript and MSI backdoors

In this article 1. Attack chain overview 2. Mitigation and protection guidance 3. Hunting queries 4. Indicators of compromise Microsoft Defender Experts observed a campaign beginning in late February 2026 that uses WhatsApp messages to deliver malicious Visual Basic Script VBS files. Once execute...

OAuth redirection abuse enables phishing and malware delivery

Microsoft observed phishing-led exploitation of OAuth’s by-design redirection mechanisms. The activity targets government and public-sector organizations and uses silent OAuth authentication flows and intentionally invalid scopes to redirect victims to attacker-controlled infrastructure without...

Infostealers without borders: macOS, Python stealers, and platform abuse

Infostealer threats are rapidly expanding beyond traditional Windows-focused campaigns, increasingly targeting macOS environments, leveraging cross-platform languages such as Python, and abusing trusted platforms and utilities to silently deliver credential-stealing malware at scale. Since late...

Microsoft Named a Leader in the 2025 IDC CNAPP MarketScape: Key Takeaways for Security Buyers

The cloud-native application protection platform CNAPP market continues to evolve rapidly as organizations look to secure increasingly complex cloud environments. In the recently published 2025 IDC MarketScape for Worldwide CNAPP, Microsoft has been recognized as a Leader, reaffirming its...

Meet the Deputy CISOs who help shape Microsoft’s approach to cybersecurity: Part 2

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...

New whitepaper outlines the taxonomy of failure modes in AI agents

We are releasing a taxonomy of failure modes in AI agents to help security professionals and machine learning engineers think through how AI systems can fail and design them with safety and security in mind. The taxonomy continues Microsoft AI Red Team's work to lead the creation of systematizati...

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. Since inception, we've dedicated the equivalent of 34,000 engineers working full-time for 11 months to mitigate risks and address the...

Moonstone Sleet emerges as new North Korean threat actor with new bag of tricks

Microsoft has identified a new North Korean threat actor, now tracked as Moonstone Sleet formerly Storm-1789, that uses both a combination of many tried-and-true techniques used by other North Korean threat actors and unique attack methodologies to target companies for its financial and...

Microsoft introduces passkeys for consumer accounts

Ten years ago, Microsoft envisioned a bold future: a world free of passwords. Every year, we celebrate World Password Day by updating you on our progress toward eliminating passwords for good. Today, we’re announcing passkey support for Microsoft consumer accounts, the next step toward our vision...

Patching Perforce perforations: Critical RCE vulnerability discovered in Perforce Helix Core Server

Microsoft discovered, responsibly disclosed, and helped remediate four vulnerabilities that could be remotely exploited by unauthenticated attackers in Perforce Helix Core Server “Perforce Server”, a source code management platform largely used in the videogame industry and by multiple...

3 reasons why now is the time to go cloud native for device management

The post 3 reasons why now is the time to go cloud native for device management appeared first on Microsoft Security Blog...

New Microsoft security tools to protect families and businesses

Today marks an exciting milestone in Microsoft’s AI journey. This morning, at an event in New York City, we made several major announcements to empower people across work and life—you can read more about Microsoft Bing and Edge with Copilot, what’s new from Microsoft 365 Copilot and Bing Chat...

Analysis of Storm-0558 techniques for unauthorized email access

Executive summary On July 11, 2023, Microsoft published two blogs detailing a malicious campaign by a threat actor tracked as Storm-0558 that targeted customer email that weve detected and mitigated: Microsoft Security Response Center and Microsoft on the Issues. As we continue our investigation...

Microsoft Security highlights from RSA Conference 2023

The RSA Conference RSAC gave us an incredible opportunity to meet with security professionals from around the world, learn about exciting advances in the world of cybersecurity, and share our own security innovations. Defenders everywhere serve an important mission of protecting our world, and RS...

Improve supply chain security and resiliency with Microsoft

Let’s start with the bad news. Cybersecurity breaches can be particularly devastating for supply chains, which involve multiple parties and sensitive information. As operational technology OT devices become increasingly connected, blurring the gap between IT and OT environments, the risk of hacke...

Discover a new era of security with Microsoft at RSAC 2023

We’re thrilled to participate and connect with you at RSA Conference 2023 RSAC from April 23 to 27, 2023, in San Francisco. Join your security peers as we welcome you to the new era of security—shaped by the power of OpenAI’s GPT-4 generative AI—and introduce to you the recently announced Microso...

Introducing Adaptive Protection in Microsoft Purview—People-centric data protection for a multiplatform world

At Microsoft, we never stop working to protect you and your data. If the evolving cyberattacks over the past three years have taught us anything, it’s that threat actors are both cunning and committed. At every level of your enterprise, attackers never stop looking for a way in. The massive...

Secure your business like you secure your home: 5 steps to protect against cybercrime

Running a business requires a lot of determination and sometimes a leap of faith. Every day brings a new challenge, and many times it can feel like the stress and uncertainty are too much. That’s when you remind yourself why you took the leap—the satisfaction of realizing your own vision—and you...

The door is open for anyone to become a cyber defender

Throughout Cybersecurity Awareness Month, Microsoft has highlighted the importance of cybersecurity and provided resources to help people and organizations stay safe. It’s great to have this month as a reminder, and even better if that awareness becomes a year-round endeavor. Education is really...

Implementing a Zero Trust strategy after compromise recovery

What changes after compromise recovery? After a successful compromise recovery effort, you are back in control. Likely, you gave your team a round of applause and took a sigh of relief. Now what? Is everything going back to as it was in the past? Absolutely not! A compromise recovery engagement i...

IT security: An opportunity to raise corporate governance scores

What is a corporate governance score? Corporate governance scoring is increasingly important to boards of directors, executive leadership, and the investment community. If we want to enlist the support of a stakeholder, we have to talk about the things that are important to them. Sales revenue is...

How one Microsoft product manager acts as champion for identity security

A technology career embodies the ancient Roman saying that “luck happens when preparation meets opportunity.” Few industries are as dynamic, fast-paced, or intense as technology. With so many challenges to solve, opportunities are everywhere, but as I’ve learned myself through the years, the best...

Discover 5 lessons Microsoft has learned about compliance management

Compliance management is a complex process—one that gets increasingly more complicated the larger an organization grows. Microsoft knows this firsthand, not only because of our experience providing Security and Compliance solutions to customers but also because of the global reach and...

Announcing 2022 Microsoft Security Excellence Awards winners

Spirits soared at the Microsoft Security Excellence Awards on June 5, 2022. And is it any wonder? The celebration marked the first time that Microsoft executives and Microsoft Intelligent Security Association MISA members had gathered in person in more than two years so it was a special night for...

The future of compliance and data governance is here: Introducing Microsoft Purview

The worldwide shift to a hybrid workplace has pushed us all to embrace ubiquitous connectivity. Those new connections have helped us become more collaborative; routinely editing and sharing documents in real-time from wherever we happen to be working. Instant messaging went from being a tool of...

Secure your healthcare devices with Microsoft Defender for IoT and HCL’s CARE

It wasn’t long ago that medical devices were isolated and unconnected, but the rise of IoT has brought real computing power to the network edge. Today, medical devices are transforming into interconnected, smart assistants with decision-making capabilities. Any device in a medical setting must be...

Secure your OT and IoT devices with Microsoft Defender for IoT and Quzara Cybertorch™

This blog post is part of the Microsoft Intelligent Security Association guest blog series. Learn more about MISA. In recent years, malicious actors have started attacking industrial control systems and key sectors of nations’ critical infrastructure to inflict damage that transcends the cyber...

Microsoft shares 4 challenges of protecting sensitive data and how to overcome them

Breaches of sensitive data are extremely costly for organizations when you tally data loss, stock price impact, and mandated fines from violations of General Data Protection Regulation GDPR, California Consumer Privacy Act CCPA, or other regulations. They also can diminish the trust of those who...

What’s Next in Security from Microsoft

One of the biggest challenges in security today is complexity. Not only is there an ever-growing number of threats, but many organizations are defending their companies with a patchwork of security solutions that don’t work well together. This piecemeal approach is costly, less secure, and hinder...

Cyber Signals: Defending against cyber threats with the latest research, insights, and trends

We’re excited to introduce Cyber Signals, a cyber threat intelligence brief informed by the latest Microsoft threat data and research. This content, which will be released quarterly, offers an expert perspective into the current threat landscape, discussing trending tactics, techniques, and...

Measure the effectiveness of your Microsoft security with AttackIQ

This blog post is part of the Microsoft Intelligent Security Association guest blog series. Learn more about MISA. To improve an organization’s cybersecurity readiness, you need to test that your detection and prevention technologies work as intended and that your security program is performing a...

Join us at InfoSec Jupyterthon 2021

We’re excited to invite our community of infosec analysts and engineers to the second annual InfoSec Jupyterthon taking place on December 2-3, 2021. This is an online event organized by our friends in the Open Threat Research Forge, together with folks from the Microsoft Threat Intelligence Cente...

Learn how Microsoft strengthens IoT and OT security with Zero Trust

As cyber threats grow more sophisticated and relentless, the need for Cybersecurity Awareness Month becomes more urgent every year. As part of our year-round commitment to security for all, Microsoft continues to track numerous incidents targeting both digital and physical operations for many...

Afternoon Cyber Tea: Learn how to stop misinformation threats from nation-state bad actors

Information has long been wielded as an instrument of national power and influence. In today’s digital world, misinformation can also be just as powerful. On a special episode of Afternoon Cyber Tea with Ann Johnson, Sandra Joyce, Executive Vice President and Head of Mandiant Intelligence at...

Unilever CISO on balancing business risks with cybersecurity

Imagine showing up to work every day knowing that your job requires protecting 160,000 employees creating more than 450 products around the world—tea, ice cream, personal care, laundry and dish soaps—across a customer base of more than two and a half billion people every day. Unilever Chief...

Identity at Microsoft Ignite: Rising to the challenges of secure remote access and employee productivity

These past months have changed the way we work in so many ways. When businesses and schools went remote overnight, many of you had to adapt quickly to ensure your users could stay productive while working from home. Bad actors are trying to exploit these seismic shifts, making it more important...

Microsoft Joins Open Source Security Foundation

Microsoft has invested in the security of open-source software for many years and today I’m excited to share that Microsoft is joining industry partners to create the Open Source Security Foundation OpenSSF, a new cross-industry collaboration hosted at the Linux Foundation. The OpenSSF brings...

CISO Stressbusters Post #3: 3 ways to share accountability for security risk management

Jim Eckart, former Chief Information Security Officer CISO of The Coca-Cola Company and current Chief Security Advisor at Microsoft shares his advice for relieving stress in today’s CISO Stressbuster post. If you are a CISO, it can feel like the responsibility for keeping the company secure rests...

New study shows customers save time, resources and improve security with Microsoft Cloud App Security

The global pandemic has forever changed our workplaces and reshaped our cybersecurity priorities. While in recent months cloud apps have helped people around the globe stay productive and connected. They also pose an increased cybersecurity risk to businesses large and small, especially when you...

Microsoft acquires CyberX to accelerate and secure customers’ IoT deployments

Today, we’re excited to announce that Microsoft has acquired CyberX, a comprehensive, network-based IoT security platform with continuous threat monitoring and sophisticated analytics that addresses IoT security in a holistic way across the enterprise. CyberX will complement the existing Azure Io...