1609 matches found
GigaWiper: Anatomy of a destructive backdoor assembled from multiple malware
In this article 1. A wiper inside a backdoor 2. Backdoor capabilities 3. How GigaWiper was assembled 4. Conclusion: Multiple destructive capabilities consolidated into a single implant 5. Defending against destructive threats 6. Microsoft Defender detections 7. Indicators of compromise In October...
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...
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...
5 insights from Frost & Sullivan’s 2025 Frost Radar™ for Cloud Security Posture Management
Cloud security posture management CSPM is being redefined as two forces collide: Cloud environments are becoming more interconnected—spanning workloads, identities, data, APIs, and development pipelines—while security teams must reduce risk faster with fewer tools and less time. Frost & Sullivan’...
5 insights from Frost & Sullivan’s 2025 Frost Radar™ for Cloud Security Posture Management
Cloud security posture management CSPM is being redefined as two forces collide: Cloud environments are becoming more interconnected—spanning workloads, identities, data, APIs, and development pipelines—while security teams must reduce risk faster with fewer tools and less time. Frost & Sullivan’...
Improving security posture across the Microsoft partner ecosystem
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...
Improving security posture across the Microsoft partner ecosystem
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...
Microsoft named a leader in the Frost Radar for cloud and application runtime security
Cloud security is shifting from visibility to contextual risk reduction, extending into the applications, APIs, and workloads where attacks actually occur. Because modern workloads are built and run in the cloud, security teams must understand which exposures matter most, prioritize what can trul...
Accelerating the quantum-safe timeline
The quantum-safe timeline has changed For years, planning for post-quantum cryptography PQC was framed as a future problem: important, inevitable, but distant. That perspective is evolving as technology advances and organizations prepare for the scale and complexity of the transition ahead. At...
What’s new in Microsoft Security: June 2026
As organizations scale AI and agents across environments, security teams need protection that covers every surface. The Microsoft vision is simple: security should be ambient and autonomous, just like the AI it protects. This month’s updates help security and IT teams strengthen identity and...
Securing AI agents: When AI tools move from reading to acting
In this article 1. From reading to acting 2. Attack pattern: MCP tool poisoning in a finance workflow 3. Mitigation and protection guidance 4. References 5. Learn more As enterprise deployments mature, some enterprise AI agents are shifting from reading content to taking action. In this post,...
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...
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...
Photo ZIP campaign targeting hospitality industry delivers Node.js implant for persistent access
In this article 1. Attack chain overview 2. Mitigation and protection guidance 3. References 4. Learn more Microsoft Threat Intelligence has identified an active multi-stage intrusion campaign targeting organizations in the hospitality and hotel industry since April 2026. We’ve observed this...
Microsoft a Leader in The Forrester Wave™ for Endpoint Management Platforms
The endpoint management category is being redefined in real time. Organizations no longer need tools that only inventory devices or enforce configuration policies; they need a platform that connects identity, security, compliance, and AI governance across every endpoint where work happens...
Microsoft a Leader in The Forrester Wave™ for Endpoint Management Platforms
The endpoint management category is being redefined in real time. Organizations no longer need tools that only inventory devices or enforce configuration policies; they need a platform that connects identity, security, compliance, and AI governance across every endpoint where work happens...
CNAPP evolution: How Microsoft aligns with leading cloud risk management platforms
Cloud security is shifting from visibility to context-aware risk reduction, helping security teams understand which exposures matter most, prioritize what can be exploited, and reduce risk across the application lifecycle. As organizations continue to expand across multicloud environments,...
StealC and Amadey: Breaking down infostealers and the cybercrime services that deliver them
In this article 1. The role of infostealers: From credential theft to intrusion 2. StealC: Infostealer for rent 3. Amadey: Malware-as-a-service for delivery of infostealers 4. Defending against StealC and Amadey intrusions 5. Microsoft Defender detections 6. Indicators of compromise Infostealers...
StealC and Amadey: Breaking down infostealers and the cybercrime services that deliver them
In this article 1. The role of infostealers: From credential theft to intrusion 2. StealC: Infostealer for rent 3. Amadey: Malware-as-a-service for delivery of infostealers 4. Defending against StealC and Amadey intrusions 5. Microsoft Defender detections 6. Indicators of compromise Infostealers...
Guarding AI memory
In this article 1. What AI memory is and why it matters 2. What is an agent memory attack? 3. How Microsoft approaches memory security in Microsoft 365 4. A guiding framework for building safe AI memory 5. Key takeaways 6. Learn more AI memory transforms an AI system from a stateless tool into a...
One intrusion, two cyberattackers: Uncovering parallel threat activity
What began as a routine ransomware investigation quickly revealed something far more complex. In this ninth cyberattack series report, DART details how a single intrusion uncovered parallel activity from two unrelated threat actors operating simultaneously—blending tactics, obscuring signals, and...
AutoJack: How a single page can RCE the host running your AI agent
In this article 1. Why we are looking at agent frameworks 1. What is AutoGen Studio 2. The AutoJack chain at a glance 3. Anatomy of the chain 1. Issue 1: Origin allowlist that the agent itself defeats 2. Issue 2: Auth middleware that opts MCP out 3. Issue 3: serverparamsfrom the URL is the comman...
New Forrester Total Economic Impact™ study projects a 124% ROI from unifying with Microsoft Security
Across many industries, organizations are unifying security and putting AI agents to work. Security teams are utilizing agents that reason, decide, and act on their behalf, under their governance. At Microsoft, we see this firsthand—more than 80% of the Fortune 500 are already using AI.1 The...
From package to postinstall payload: Inside the Mastra npm supply chain compromise by Sapphire Sleet
In this article 1. Attack chain overview 1. Discovery and initial indicators 2. Dependency injection: the poisoned package.json 3. Typosquat analysis: easy-day-js 4. Staged delivery pattern 5. Obfuscation and payload analysis 6. TLS bypass to self-deletion 7. Timeline analysis 2. Who is Sapphire...
Crypto Clipper uses Tor and worm-like propagation for persistence and control
In this article 1. Attack chain overview 2. Mitigation and protection guidance 3. References 4. Learn more Microsoft Threat Intelligence and Microsoft Defender Experts identified a Windows-based cryptocurrency clipper that has affected users since February of 2026. Clipper malware relies on...
Crypto Clipper uses Tor and worm-like propagation for persistence and control
In this article 1. Attack chain overview 2. Mitigation and protection guidance 3. References 4. Learn more Microsoft Threat Intelligence and Microsoft Defender Experts identified a Windows-based cryptocurrency clipper that has affected users since February of 2026. Clipper malware relies on...
Beyond the benchmark: Advancing security at AI speed
In this article 1. From the lab into the pipeline 2. This month’s set of discoveries 3. Beyond the headline: What the engineering work taught us 4. Where we go next 5. Defense at AI speed 6. Learn more Every vulnerability has two clocks running. One belongs to the defender racing to find it; the...
Beyond the benchmark: Advancing security at AI speed
In this article 1. From the lab into the pipeline 2. This month’s set of discoveries 3. Beyond the headline: What the engineering work taught us 4. Where we go next 5. Defense at AI speed 6. Learn more Every vulnerability has two clocks running. One belongs to the defender racing to find it; the...
Forrester names Microsoft a Leader in the 2026 Extended Detection and Response Platforms Wave™ report
We are excited to share that Microsoft has been named a Leader inThe Forrester Wave™: Extended Detection and Response Platforms, Q2 2026. Microsoft ranked the highest of any vendor evaluated in the Strategy category and is the only vendor to receive the highest score in Vision. Microsoft also...
Forrester names Microsoft a Leader in the 2026 Extended Detection and Response Platforms Wave™ report
We are excited to share that Microsoft has been named a Leader inThe Forrester Wave™: Extended Detection and Response Platforms, Q2 2026. Microsoft ranked the highest of any vendor evaluated in the Strategy category and is the only vendor to receive the highest score in Vision. Microsoft also...
AI is accelerating cyberattacks—here’s how to stay ahead
In March, we wrote that identity security has become the new pressure point for modern cyberattacks. Since then, AI has only increased that pressure. AI helps cyberattackers move faster across the attack chain: personalizing social engineering at scale, automating reconnaissance, analyzing leaked...
AI is accelerating cyberattacks—here’s how to stay ahead
In March, we wrote that identity security has become the new pressure point for modern cyberattacks. Since then, AI has only increased that pressure. AI helps cyberattackers move faster across the attack chain: personalizing social engineering at scale, automating reconnaissance, analyzing leaked...
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...
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...
Turn specs into evals for any agent with ASSERT
Today, we’re releasing Adaptive Spec-driven Scoring for Evaluation and Regression Testing ASSERT, an open-source framework for turning natural-language behavior specifications into executable evaluations. Every team building an AI system starts with a clear intention for the behaviors they want t...
Turn specs into evals for any agent with ASSERT
Today, we’re releasing Adaptive Spec-driven Scoring for Evaluation and Regression Testing ASSERT, an open-source framework for turning natural-language behavior specifications into executable evaluations. Every team building an AI system starts with a clear intention for the behaviors they want t...
Reconstructing AI activity in investigations
AI systems are now part of everyday work. Investigators need a consistent way to reconstruct what happened within them. Security teams are already investigating activity involving Microsoft 365 Copilot and Azure AI services—from prompt injection attempts to unexpected data access. Those signals a...
Reconstructing AI activity in investigations
AI systems are now part of everyday work. Investigators need a consistent way to reconstruct what happened within them. Security teams are already investigating activity involving Microsoft 365 Copilot and Azure AI services—from prompt injection attempts to unexpected data access. Those signals a...
AI brands as bait: How threat actors are using the AI hype in social engineering
In this article 1. ChatGPT-themed lure leads to phishing kit collecting credit card data 2. Claude-themed phishing campaign collected credentials and access tokens 3. "Awesome AI Windows Plugin” malvertising deploys Vidar stealer 4. Fake DeepSeek V4 installers on GitHub delivered Vidar Stealer 5...
AI brands as bait: How threat actors are using the AI hype in social engineering
In this article 1. ChatGPT-themed lure leads to phishing kit collecting credit card data 2. Claude-themed phishing campaign collected credentials and access tokens 3. "Awesome AI Windows Plugin” malvertising deploys Vidar stealer 4. Fake DeepSeek V4 installers on GitHub delivered Vidar Stealer 5...
Securing CI/CD in an agentic world: Claude Code Github action case
Microsoft Threat Intelligence discovered that Anthropic's Claude Code GitHub Action could expose CI/CD workflow secrets when AI agents process untrusted GitHub content, including issue bodies, pull request descriptions, and comments. We found that while Claude Code Action supported environment...
Securing CI/CD in an agentic world: Claude Code Github action case
Microsoft Threat Intelligence discovered that Anthropic's Claude Code GitHub Action could expose CI/CD workflow secrets when AI agents process untrusted GitHub content, including issue bodies, pull request descriptions, and comments. We found that while Claude Code Action supported environment...
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...
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...
Preinstall to persistence: Inside the Red Hat npm Miasma credential-stealing campaign
In this article 1. Attack chain overview 2. Mitigation and protection guidance 3. Learn more Microsoft Threat Intelligence identified a large-scale npm supply chain attack affecting 32 maliciously modified packages across more than 90 versions under the @redhat-cloud-services npm scope. The...
Preinstall to persistence: Inside the Red Hat npm Miasma credential-stealing campaign
In this article 1. Attack chain overview 2. Mitigation and protection guidance 3. Learn more Microsoft Threat Intelligence identified a large-scale npm supply chain attack affecting 32 maliciously modified packages across more than 90 versions under the @redhat-cloud-services npm scope. The...
Microsoft Build 2026: Securing code, agents, and models across the development lifecycle
In this article 1. Secure your code 2. Secure your agents 3. Trust agents with your data 4. Secure your models 5. Trust starts with security Today, developers and security teams are caught in growing tension. AI is accelerating development and introducing new issues around insecure code, opaque...
Microsoft Build 2026: Securing code, agents, and models across the development lifecycle
In this article 1. Secure your code 2. Secure your agents 3. Trust agents with your data 4. Secure your models 5. Trust starts with security Today, developers and security teams are caught in growing tension. AI is accelerating development and introducing new issues around insecure code, opaque...
Malicious npm packages abuse dependency confusion to profile developer environments
In this article 1. Attack chain overview 2. Threat actor attribution 3. Mitigation and protection guidance 4. Indicators of Compromise IOC 5. References 6. Learn more Microsoft Threat Intelligence has uncovered an active supply chain attack involving malicious npm packages registered under...
Malicious npm packages abuse dependency confusion to profile developer environments
In this article 1. Attack chain overview 2. Threat actor attribution 3. Mitigation and protection guidance 4. Indicators of Compromise IOC 5. References 6. Learn more Microsoft Threat Intelligence has uncovered an active supply chain attack involving malicious npm packages registered under...