How Microsoft Defender protects high-value assets in real-world attack scenarios
High-value assets including domain controllers, web servers, and identity infrastructure are frequent targets in sophisticated attacks.
Research
Explore in-depth research on the latest cybersecurity threats, trends, and defense strategies. Get insights from Microsoft that’ll help you better understand and respond to today’s challenges.
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Guidance for detecting, investigating, and defending against the Trivy supply chain compromise
Threat actors abused trusted Trivy distribution channels to inject credential‑stealing malware into CI/CD pipelines worldwide. -
Case study: How predictive shielding in Defender stopped GPO-based ransomware before it started
Microsoft Defender stopped a human-operated ransomware attack that abused Group Policy Objects (GPOs) to disable defenses and push encryption at scale. -
CTI-REALM: A new benchmark for end-to-end detection rule generation with AI agents
Excerpt: CTI-REALM is Microsoft’s open-source benchmark for evaluating AI agents on real-world detection engineering—turning cyber threat intelligence (CTI) into validated detections. Retain Microsoft Security Experts
Microsoft Security Experts are now available to strengthen your team with managed security services. Learn how to defend against threats with security experts.
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When tax season becomes cyberattack season: Phishing and malware campaigns using tax-related lures
During tax season, threat actors reliably take advantage of the urgency and familiarity of time-sensitive emails, including refund notices, payroll forms, filing reminders, and requests from tax professionals, to push malicious attachments, links, or QR codes. -
Observability for AI Systems: Strengthening visibility for proactive risk detection
As AI systems grow more autonomous, observability becomes essential. -
Storm-2561 uses SEO poisoning to distribute fake VPN clients for credential theft
Storm-2561 uses SEO poisoning to push fake VPN downloads that install signed trojans and steal VPN credentials. -
Detecting and analyzing prompt abuse in AI tools
Hidden instructions in content can subtly bias AI, and our scenario shows how prompt injection works, highlighting the need for oversight and a structured response playbook. Modernize your Security Operations Center with Microsoft Sentinel
Microsoft Sentinel is a cloud-native SIEM solution powered by AI and automation that delivers intelligent security analytics across your entire enterprise.
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Contagious Interview: Malware delivered through fake developer job interviews
The Contagious Interview campaign weaponizes job recruitment to target developers. -
AI as tradecraft: How threat actors operationalize AI
Threat actors are operationalizing AI to scale and sustain malicious activity, accelerating tradecraft and increasing risk for defenders, as illustrated by recent activity from North Korean groups such as Jasper Sleet and Coral Sleet (formerly Storm-1877). -
Malicious AI Assistant Extensions Harvest LLM Chat Histories
Malicious AI browser extensions collected LLM chat histories and browsing data from platforms such as ChatGPT and DeepSeek. -
Inside Tycoon2FA: How a leading AiTM phishing kit operated at scale
Tycoon2FA has become a leading phishing-as-a-service (PhaaS) platforms, enabling campaigns that reach over 500,000 organizations monthly, prompting Microsoft’s Digital Crimes Unit (DCU) to work with Europol and industry partners to facilitate a disruption of Tycoon2FA’s infrastructure and operations.
