Threat intelligence

The Microsoft Threat Intelligence community is made up of world-class experts, security researchers, analysts, and threat hunters who analyze 100 trillion signals daily to discover threats and deliver timely and relevant insight to protect customers. See our latest findings, insights, and guidance.

November 3 14 min read

Fake-download campaign uses trojanized installers to deliver monetization payloads

Microsoft Threat Intelligence tracks a fake-download campaign that uses trojanized Inno installers to deliver multiple monetization offers and provides detection and investigation guidance across the complete installer session.
November 2 7 min read

What exploited vulnerabilities have in common: A data-driven analysis of real-world attacks

Real-world exploitation concentrates in a small, high-impact subset of CVEs.
October 30 11 min read

Inside a malicious Claude Code-branded extension and its persistent SSH backdoor

Microsoft analyzes a malicious Claude Code–branded extension, its persistent SSH backdoor, and guidance to detect and remediate it.
October 30 16 min read

From help desk impersonation to AD CS abuse: Investigating ESC1 and ESC8 intrusion paths

Teams support impersonation led to remote access, malicious runtime execution, and Certificate Services abuse through authentication relay and Kerberos.
Retain Microsoft Defender Experts

Microsoft Defender Experts are available to strengthen your teams with expertise when and where you need it. Learn how to elevate your security with expert-led services.

Get started
October 29 14 min read

Tracking AI adoption in North Korean threat actor tradecraft

As Microsoft Threat Intelligence continues to track how threat actors operationalize AI to increase the speed and efficiency of attacks, we’ve identified North Korean threat actors expanding their use of AI with varying levels of adoption.
October 21 15 min read

AI-driven, large-scale nation-state campaign using ARTEX enables supply chain compromise

Storm-0940 used ARTEX agentic AI to accelerate a ConnectWise supply chain compromise, enabling application credential abuse across Microsoft 365 environments.
October 14 14 min read

The hidden network: Inside the phishing infrastructure ecosystem powering global cybercrime

Microsoft uncovered a Chinese-language cybercriminal ecosystem, an interconnected network of phishing kit operators (tracked as Storm-2990), and an illicit marketplace (tracked as Storm-3119) selling tools and infrastructure for large-scale phishing.
September 30 20 min read

Unauthenticated command injection on internet-facing mail servers: tracking CVE-2026-73570

Microsoft Threat Intelligence examines CVE-2026-73570 exploitation in Zimbra, including observed attack paths, detection opportunities, and mitigation guidance.
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.

Learn more
September 29 14 min read

Phishing Abuses RMM Tools for Persistent Access

Microsoft observed phishing campaigns that abused MSP360 RMM to deploy ScreenConnect, creating redundant remote-access channels for follow-on activity
September 29 20 min read

Star Blizzard refines phishing and malware delivery with the RedFlick technique

Since January 2026, Microsoft has observed Russian state threat actor Star Blizzard evolve their detection evasion capabilities through large-scale phishing campaigns, the use of accounts on compromised websites, and a novel malware delivery technique, tracked by Microsoft as “RedFlick”.
September 28 14 min read

NeedyMantis: Unpacking a post-compromise malware family used in targeted operations

Microsoft Threat Intelligence identified NeedyMantis, a modular post-compromise malware framework used in targeted intrusions that combines custom loaders, encrypted archives, and extensible components to maintain long-term access and support follow-on operations.
September 25 9 min read

Storm-3168: Agentic-driven cloud attacks using compromised service principals

Microsoft details JADEPUFFER-linked Azure reconnaissance, resource deletion, and credential access using compromised service principals, identifying the activity as associated with Storm-3168 and providing guidance for defenders.

Threat intelligence

Filtered by

Refine results

What exploited vulnerabilities have in common: A data-driven analysis of real-world attacks

Inside a malicious Claude Code-branded extension and its persistent SSH backdoor

From help desk impersonation to AD CS abuse: Investigating ESC1 and ESC8 intrusion paths

AI-driven, large-scale nation-state campaign using ARTEX enables supply chain compromise

Unauthenticated command injection on internet-facing mail servers: tracking CVE-2026-73570

NeedyMantis: Unpacking a post-compromise malware family used in targeted operations

Storm-3168: Agentic-driven cloud attacks using compromised service principals

Get started with Microsoft Security

Threat intelligence

Filtered by

Refine results

Retain Microsoft Defender Experts

Modernize your Security Operations Center with Microsoft Sentinel

Get started with Microsoft Security