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.
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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From transparency to action: What the latest Microsoft email security benchmark reveals
The latest Microsoft benchmarking data reveals how Microsoft Defender mitigates modern email threats compared to SEG and ICES vendors. -
Contagious Interview: Malware delivered through fake developer job interviews
The Contagious Interview campaign weaponizes job recruitment to target developers. -
Secure agentic AI for your Frontier Transformation
Learn how Microsoft Agent 365 and Microsoft 365 E7 can help secure your Frontier Transformation. Prevent threats with Microsoft Defender
The Microsoft Defender family offers comprehensive threat prevention, detection, and response capabilities for everyone—from individuals looking to protect their family to the world’s largest enterprises.
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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. -
Signed malware impersonating workplace apps deploys RMM backdoors
Signed malware backed by a stolen EV certificate deployed legitimate RMM tools to gain persistent access inside enterprise environments. 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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OAuth redirection abuse enables phishing and malware delivery
OAuth redirection is being repurposed as a phishing delivery path. -
Threat modeling AI applications
AI threat modeling helps teams identify misuse, emergent risk, and failure modes in probabilistic and agentic AI systems. -
Developer-targeting campaign using malicious Next.js repositories
A developer-targeting campaign leveraged malicious Next. -
Scaling security operations with Microsoft Defender autonomous defense and expert-led services
AI-powered cyberattacks outpace aging SOC tools, and this new guide explains why manual defense fails and how autonomous, expert-led security transforms modern protection.
