Microsoft Defender
Microsoft Defender helps prevent, detect, and respond to attacks across devices, identities, apps, email, data, workloads, and clouds. Explore threat intelligence, capabilities, and real-world guidance to help you get more out of Defender.
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In the latest edition of our Cyberattack Series, we dive into real-world cases targeting retail organizations. -
XCSSET evolves again: Analyzing the latest updates to XCSSET’s inventory
Microsoft Threat Intelligence has uncovered a new variant of the XCSSET malware, which is designed to infect Xcode projects, typically used by software developers building Apple or macOS-related applications. -
Microsoft named a Leader in the IDC MarketScape for XDR
Microsoft has been named a Leader in IDC’s inaugural category for Worldwide Extended Detection and Response (XDR) Software for 2025, recognized for its deep integration, intelligent automation, and unified security operations solutions. -
Investigating active exploitation of CVE-2025-10035 GoAnywhere Managed File Transfer vulnerability
Storm-1175, a financially motivated actor known for deploying Medusa ransomware and exploiting public-facing applications for initial access, was observed exploiting the deserialization vulnerability in GoAnywhere MFT’s License Servlet, tracked as CVE-2025-10035. -
Microsoft raises the bar: A smarter way to measure AI for cybersecurity
ExCyTIn-Bench is Microsoft’s newest open-source benchmarking tool designed to evaluate how well AI systems perform real-world cybersecurity investigations. -
The new Microsoft Security Store unites partners and innovation
The Microsoft Security Store is the gateway for customers to easily discover, buy, and deploy trusted security solutions and AI agents from leading partners. -
Harden your identity defense with improved protection, deeper correlation, and richer context
Expanded ITDR features—including the new Microsoft Defender for Identity sensor, now generally available—bring improved protection, correlation, and context to help customers modernize their identity defense. -
The 5 generative AI security threats you need to know about detailed in new e-book
In this blog post, we’ll highlight the key themes covered in the e-book, including the challenges organizations face, the top generative AI threats to organizations, and how companies can enhance their security posture to meet the dangers of today’s unpredictable AI environments. -
SesameOp: Novel backdoor uses OpenAI Assistants API for command and control
Microsoft Incident Response – Detection and Response Team (DART) researchers uncovered a new backdoor that is notable for its novel use of the OpenAI Assistants Application Programming Interface (API) as a mechanism for command-and-control (C2) communications.