Microsoft Security Blog
Your source for the latest in cybersecurity
Featured Posts
Reimagining the SOC for the agentic era in Microsoft Defender
We are announcing ISOC in Microsoft Defender: a foundation built for agentic security that brings leading solutions for SIEM and threat protection together.
From guidance to action: Security fundamentals that materially reduce risk
AI has made fundamental changes to the operating environment for cybersecurity.
Improving email security outcomes with real-world Microsoft Defender insights
The latest email security benchmarking reports show strong Microsoft Defender performance across pre-delivery and post-delivery scenarios and reveal where threats and defenses continue to evolve.
What’s new in Microsoft Security: August 2026
This month’s updates provide new capabilities to help organizations gain insights into agent activity, expand security coverage across supported environments, and enhance security management across their environments.
Threat intelligence
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Unmasking EvilTokens: Getting to the root of device code phishing
EvilTokens has quickly become one of the top PhaaS platforms, enabling device code phishing attacks through AI-assisted lures, automated infrastructure, and token theft. -
Protecting organizations from AI-assisted executive impersonation and invoice fraud
Microsoft examines an AI-assisted business email compromise campaign that used executive impersonation and fake invoices to target finance teams with ACH payment fraud. -
Passkey-themed social engineering leads to identity and cloud compromise
Passkey-themed social engineering is being used to compromise identities and enable broader cloud attacks.
Stay ahead of threats
Get expert insights, threat intelligence, and the latest cybersecurity reports from Security Insider.
AI and machine learning
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Reimagining the SOC for the agentic era in Microsoft Defender
We are announcing ISOC in Microsoft Defender: a foundation built for agentic security that brings leading solutions for SIEM and threat protection together. -
From guidance to action: Security fundamentals that materially reduce risk
AI has made fundamental changes to the operating environment for cybersecurity. -
Improving email security outcomes with real-world Microsoft Defender insights
The latest email security benchmarking reports show strong Microsoft Defender performance across pre-delivery and post-delivery scenarios and reveal where threats and defenses continue to evolve.
Modernize your security operations center
Confidently secure your multicloud, multiplatform environment with Microsoft Sentinel – a cloud-native security information and event management (SIEM) solution.
Latest posts
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Reimagining the SOC for the agentic era in Microsoft Defender
We are announcing ISOC in Microsoft Defender: a foundation built for agentic security that brings leading solutions for SIEM and threat protection together. -
Unmasking EvilTokens: Getting to the root of device code phishing
EvilTokens has quickly become one of the top PhaaS platforms, enabling device code phishing attacks through AI-assisted lures, automated infrastructure, and token theft. -
From guidance to action: Security fundamentals that materially reduce risk
AI has made fundamental changes to the operating environment for cybersecurity. -
Improving email security outcomes with real-world Microsoft Defender insights
The latest email security benchmarking reports show strong Microsoft Defender performance across pre-delivery and post-delivery scenarios and reveal where threats and defenses continue to evolve. -
Protecting organizations from AI-assisted executive impersonation and invoice fraud
Microsoft examines an AI-assisted business email compromise campaign that used executive impersonation and fake invoices to target finance teams with ACH payment fraud. -
Detect and disrupt AI-themed attacks with Microsoft Defender
See how Microsoft Defender detects and disrupts AI-themed phishing, malware, and multi-stage attacks across the attack chain.