Flax Typhoon using legitimate software to quietly access Taiwanese organizations

Summary Microsoft has identified a nation-state activity group tracked as Flax Typhoon, based in China, that is targeting dozens of organizations in Taiwan with the likely intention of performing espionage. Flax Typhoon gains and maintains long-term access to Taiwanese organizations networks with...

How to build stronger security teams

The security community is continuously changing, growing, and learning from each other to better position the world against cyberthreats. In the latest post of our Community Voices blog series, Microsoft Security Senior Product Marketing Manager Brooke Lynn Weenig talks with Truesec Chief Chaos...

Join our digital event to learn what’s new in Microsoft Entra

Editors note 6/15/2023: This blog has been updated to reflect the new date for this event, which is now July 11, 2023. It was previously scheduled for June 20, 2023. In today’s interconnected world, there’s virtually no limit to what technology can help us achieve. Millions of connections happen...

XDR meets IAM: Comprehensive identity threat detection and response with Microsoft

Identity has become the corporate security perimeter. The average organization used 130 different cloud applications in 2022. That’s up 18 percent from 2021 alone.1 And as organizations continue to embrace digital transformation and enable remote work, they look to identity and access management...

Microsoft shifts to a new threat actor naming taxonomy

April 19, 2023 update – We have published a JSON file mapping old threat actor names with their new names in the updated taxonomy, summarized here: https://aka.ms/threatactors. We also added hunting queries that Microsoft customers can use while transitioning to the new taxonomy. See the Resource...

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...

Microsoft contributes S2C2F to OpenSSF to improve supply chain security

On August 4, 2022, Microsoft publicly shared a framework.pdf that it has been using to secure its own development practices since 2019, the Secure Supply Chain Consumption Framework S2C2F, previously the Open Source Software-Supply Chain Security OSS-SSC Framework. As a massive consumer of and...

CSO perspective: Why a strong IAM strategy is key to an organization’s cybersecurity approach

The security community is continuously changing, growing, and learning from each other to better position the world against cyberthreats. In the latest post of our Community Voices blog series, Microsoft Security Senior Product Marketing Manager Brooke Lynn Weenig talks with Alissa “Dr. Jay”...

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...

Building a safer world together with our partners—introducing Microsoft Security Experts

More threats—not enough defenders The security landscape has become increasingly challenging and complex for our customers. Threats have grown at an alarming rate over the last year, and cybercrime is now expected to cost the world USD10.5 trillion annually by 2025, up from USD3 trillion a decade...

How one senior developer brings the startup spirit to Microsoft

I recently had the opportunity to visit the Microsoft Africa Development Center, in my role as executive sponsor, for dedication ceremonies we hosted in both Nigeria and Kenya. All I have to say is, “Wow!” The energy at the ADC is simply electric. There’s so much optimism and so much enthusiasm f...

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...

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...

New research shows IoT and OT innovation is critical to business but comes with significant risks

The need for much improved IoT and operational technology OT cybersecurity became clearer this year with recent attacks on network devices,1 surveillance systems,2 an oil pipeline,3 and a water treatment facility,4 to name a few examples. To better understand the challenges customers are facing,...

Microsoft is a 5-time Leader in the Gartner Magic Quadrant for Access Management

We are honored that Gartner recognized Microsoft as a Leader in Gartner® Magic QuadrantTM for Access Management in Microsoft Azure Active Directory Azure AD. In addition, Microsoft has placed the farthest right on the “Completeness of Vision” axis. None of this is possible without you, our...

How Microsoft Defender for IoT can secure your IoT devices

Cybersecurity threats are always evolving, and today we’re seeing a new wave of advanced attacks specifically targeting IoT devices used in enterprise environments as well as operational technology OT devices used in industrial systems and critical infrastructure like ICS/SCADA. It’s not surprisi...

Why diversity is important for a strong cybersecurity team

Medicine. Aeronautics. Academia. When you’re a cybersecurity professional, the colleague next to you could have started in one of these industries—or just about any other you can imagine. The backgrounds of cybersecurity professionals are more diverse than those of professionals in other...

Strategies, tools, and frameworks for building an effective threat intelligence team

How to think about building a threat intelligence program The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Product Marketing Manager Natalia...

Microsoft teams up with law enforcement and other partners to disrupt Gamarue (Andromeda)

Today, with help from Microsoft security researchers, law enforcement agencies around the globe, in cooperation with Microsoft Digital Crimes Unit DCU, announced the disruption of Gamarue, a widely distributed malware that has been used in networks of infected computers collectively called the...

A decade inside Microsoft Security

Ten years ago, I walked onto Microsofts Redmond campus to take a role on a team that partnered with governments and CERTs on cybersecurity. Id just left a meaningful career in US federal government service because I thought it would be fascinating to experience first-hand the security challenges...

Threat matrix: Mapping threats across cloud web applications

In this article 1. Overview 2. Technique Catalog 3. Privilege Escalation 4. Mitigation and protection guidance 5. References 6. Learn more Microsoft introduces the cloud web applications threat matrix, a MITRE ATT &CK-aligned framework that helps defenders understand, prioritize, and mitigate...

Microsoft Defender email security benchmarking: Key insights from one year of data

Microsoft publishes quarterly email security benchmarking data comparing Microsoft Defender against secure email gateway SEG and integrated cloud email security ICES vendors using real-world threat telemetry. A year ago, we set out to change how email security effectiveness is measured. With our...

When configuration becomes a vulnerability: Exploitable misconfigurations in AI apps

In this article 1. Background 2. What is an exploitable misconfiguration? 3. Exploitable misconfigurations in popular AI applications 4. Minimizing the risk: Practical deployment guidance 5. How Microsoft Defender for Cloud helps detect exposures in Kubernetes 6. Learn more AI and agentic...

Storm-2561 uses SEO poisoning to distribute fake VPN clients for credential theft

In this article 1. From search to stolen credentials: Storm-2561 attack chain 2. Defending against credential theft campaigns 3. Microsoft Defender detection and hunting guidance 4. Indicators of compromise In mid-January 2026, Microsoft Defender Experts identified a credential theft campaign tha...

Developer-targeting campaign using malicious Next.js repositories

Microsoft Defender Experts identified a coordinated developer-targeting campaign delivered through malicious repositories disguised as legitimate Next.js projects and technical assessment materials. Telemetry collected during this investigation indicates the activity aligns with a broader cluster...

Defending against the CVE-2025-55182 (React2Shell) vulnerability in React Server Components

CVE-2025-55182 also referred to as React2Shell and includes CVE-2025-66478, which was merged into it is a critical pre-authentication remote code execution RCE vulnerability affecting React Server Components, Next.js, and related frameworks. With a CVSS score of 10.0, this vulnerability could all...

New Microsoft Secure Future Initiative (SFI) patterns and practices: Practical guides to strengthen security

Building on the momentum of our initial launch of the Microsoft Secure Future Initiative SFI patterns and practices, this second installment continues our commitment to making security implementation practical and scalable. The first release introduced a foundational library of actionable guidanc...

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,...

Marbled Dust leverages zero-day in Output Messenger for regional espionage

Since April 2024, the threat actor that Microsoft Threat Intelligence tracks as Marbled Dust has been observed exploiting user accounts that have not applied fixes to a zero-day vulnerability CVE-2025-27920 in the messaging app Output Messenger, a multiplatform chat software. These exploits have...

“Dirty stream” attack: Discovering and mitigating a common vulnerability pattern in Android apps

Microsoft discovered a path traversal-affiliated vulnerability pattern in multiple popular Android applications that could enable a malicious application to overwrite files in the vulnerable application’s home directory. The implications of this vulnerability pattern include arbitrary code...

Protecting credentials against social engineering: Cyberattack Series

Our story begins with a customer whose help desk unwittingly assisted a threat actor posing as a credentialed employee. In this fourth report in our ongoing Cyberattack Series, we look at the steps taken to discover, understand, and respond to a credential phishing and smishing text-based phishin...

An integrated incident response solution with Microsoft and PwC

Today Microsoft Incident Response is excited to announce a new collaboration with PwC to expand our joint incident response and recovery capability. In this global alliance, Microsoft begins the initial containment and investigation, bringing a deep understanding of a company’s infrastructure to...

Public preview: Improve Win32 app security via app isolation

The post Public preview: Improve Win32 app security via app isolation appeared first on Microsoft Security Blog...

Cyber Signals: Shifting tactics fuel surge in business email compromise

Today we released the fourth edition of Cyber Signals highlighting a surge in cybercriminal activity around business email compromise BEC. Microsoft has observed a 38 percent increase in cybercrime as a service CaaS targeting business email between 2019 and 2022.1 Successful BEC attacks cost...

LinkedIn and Microsoft Entra introduce a new way to verify your workplace

In the digital world, when you meet professional contacts for the first time online, you need additional trust signals to increase your confidence that they are who they say they are. We’re thrilled to announce that millions of LinkedIn members will be able to verify their place of work with a...

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...

Microsoft threat intelligence presented at CyberWarCon 2022

At CyberWarCon 2022, Microsoft and LinkedIn analysts presented several sessions detailing analysis across multiple sets of actors and related activity. This blog is intended to summarize the content of the research covered in these presentations and demonstrates Microsoft Threat Intelligence...

Improving AI-based defenses to disrupt human-operated ransomware

Microsoft’s deep understanding of human-operated ransomware attacks, which are powered by a thriving cybercrime gig economy, continuously informs the solutions we deliver to protect customers. Our expert monitoring of threat actors, investigations into real-world ransomware attacks, and the...

Microsoft collaborates with Tenable to support federal cybersecurity efforts

On May 12, 2021, the White House issued Presidential Executive Order EO 14028 to establish cybersecurity as a national priority.1 As part of this effort, the White House has called for greater public and private sector collaboration to address the evolving threats facing federal agencies. In the...

Secure access for a connected world—meet Microsoft Entra

What could the world achieve if we had trust in every digital experience and interaction? This question has inspired us to think differently about identity and access, and today, we’re announcing our expanded vision for how we will help provide secure access for our connected world. Microsoft Ent...

Center for Threat-Informed Defense, Microsoft, and industry partners streamline MITRE ATT&CK® matrix evaluation for defenders

The MITRE Center for Threat-Informed Defense, Microsoft, and other industry partners collaborated on a project that created a repeatable methodology for developing a top MITRE ATT&CK® techniques list. The method aims to facilitate navigation of the ATT&CK framework, which could help new defenders...

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...

3 strategies to launch an effective data governance plan

Aware of the potential risks of sensitive data if not managed properly, you’ve undertaken a data discovery process to learn where it’s all stored. You’ve classified this sensitive data—confidential information like credit card numbers and home addresses collected from customers, prospects,...

Why decentralization is the future of digital identities

Our identity is increasingly becoming digitized—more of our hard copy credentials are converting into digital formats. We use these digital credentials to work, learn, play, socialize, shop, and consume services online and offline every day. It’s so convenient and expected now to be able to have...

4 best practices to implement a comprehensive Zero Trust security approach

Today’s threat actors don’t see barriers, they see opportunities. As the old firewalls protecting the corporate network become obsolete amid the rush to adopt a hybrid workspace, implementing Zero Trust security has become an imperative across all sectors, both public and private. During this tim...

Gartner® names Microsoft a Leader in the 2022 Magic Quadrant™ for Enterprise Information Archiving

With data doubling every two years, it is more critical than ever to have simple and integrated tools to understand and manage risks to an organization. As more people work remotely, users collaborate and store data in different locations. These secular trends offer new possibilities in how work...

Align your security and network teams to Zero Trust security demands

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Security Product Marketing Manager Natalia Godyla talks with Jennifer Minella, Founder and...

Your guide to mobile digital forensics

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Security Product Marketing Manager Natalia Godyla talks with Cellebrite Senior Director of...

How to assess and improve the security culture of your business

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Security Product Marketing Manager Natalia Godyla talks with Cygenta Co-founder and Co-Chief...