Compromised @antv npm packages deploy the Mini Shai-Hulud payload to steal CI/CD secrets from Linux-based automation environments. The malware executes during npm install and targets credentials across GitHub, AWS, Kubernetes, Vault, npm, and 1Password platforms. The post Mini Shai Hulud:…
Tag: Microsoft Security Blog
Securing the gaming culture of cultures
Read about the unique challenges and rewards of securing gaming platforms and how to better protect gaming communities. The post Securing the gaming culture of cultures appeared first on Microsoft Security Blog. This article has been indexed from Microsoft Security…
Introducing RAMPART and Clarity: Open source tools to bring safety into Agent development workflow
The AI systems shipping inside enterprises today are fundamentally different from the ones we were building even two years ago, because they have moved well past answering questions and into accessing your email, retrieving records from your CRM, writing and…
Exposing Fox Tempest: A malware-signing service operation
Fox Tempest is a financially motivated threat actor operating a malware‑signing‑as‑a‑service (MSaaS) used by other cybercriminals, including Vanilla Tempest and Storm groups, to more effectively distribute malicious code, including ransomware. The post Exposing Fox Tempest: A malware-signing service operation appeared…
How Storm-2949 turned a compromised identity into a cloud-wide breach
Storm-2949 turned stolen credentials into a cloud-wide breach, moving from identity compromise to large-scale data theft without using malware. This incident shows how threat actors can exploit trusted systems to operate undetected. The post How Storm-2949 turned a compromised identity…
How to better protect your growing business in an AI-powered world
AI is reshaping work and introducing new risks. See how built-in security helps keep your growing business running, protect customer trust, and support growth. The post How to better protect your growing business in an AI-powered world appeared first on…
Defense in depth for autonomous AI agents
As AI agents gain autonomy, defense in depth must evolve, with application-layer design, identity, and human oversight at the center. The post Defense in depth for autonomous AI agents appeared first on Microsoft Security Blog. This article has been indexed…
Kazuar: Anatomy of a nation-state botnet
Kazuar, a sophisticated malware family attributed to the Russian state actor Secret Blizzard, has been under constant development for years and continues to evolve in support of espionage-focused operations. Over time, Kazuar has expanded from a relatively traditional backdoor into…
When configuration becomes a vulnerability: Exploitable misconfigurations in AI apps
Exposed UIs, weak authentication, and risky defaults could turn cloud-native AI apps on Kubernetes into potential targets by threat actors. Learn how exploitable misconfigurations lead to RCE and data leaks. The post When configuration becomes a vulnerability: Exploitable misconfigurations in…
Accelerating detection engineering using AI-assisted synthetic attack logs generation
What if you could generate realistic attack telemetry on demand? Explore research methods that translate attacker behaviors (TTPs) into synthetic logs that can trigger detections at scale and without sensitive data. The post Accelerating detection engineering using AI-assisted synthetic attack…
Defense at AI speed: Microsoft’s new multi-model agentic security system finds 16 new vulnerabilities
Today Microsoft is announcing a major step forward in AI-powered cyber defense: a new multi-model agentic scanning harness (codenamed MDASH). The post Defense at AI speed: Microsoft’s new multi-model agentic security system finds 16 new vulnerabilities appeared first on Microsoft…
Defending consumer web properties against modern DDoS attacks
Read how to protect consumer websites and defend against modern DDoS attacks with layered security, resilient architecture, and graceful service degradation. The post Defending consumer web properties against modern DDoS attacks appeared first on Microsoft Security Blog. This article has…
Undermining the trust boundary: Investigating a stealthy intrusion through third-party compromise
Microsoft Incident Response investigated an attack operated through legitimate and trusted administrative mechanisms to blend seamlessly into routine operations and remain undetected demonstrating that intrusions have increasingly avoided using noisy exploits, obvious malware, or custom tooling, instead leveraging systems that…
Active attack: Dirty Frag Linux vulnerability expands post-compromise risk
Dirty Frag is a newly disclosed Linux local privilege escalation vulnerability affecting kernel networking and memory-fragment handling components including esp4, esp6, and rxrpc. The vulnerability enables reliable escalation from an unprivileged user to root and may be leveraged after initial…
When prompts become shells: RCE vulnerabilities in AI agent frameworks
AI agents have fundamentally changed the threat model of AI model-based applications. By equipping these models with plugins (also called tools), your agents no longer just generate text; they now read files, search connected databases, run scripts, and perform other…
World Passkey Day: Advancing passwordless authentication
This World Passkey Day, read how Microsoft is advancing passkey adoption to replace passwords, cut phishing risk, and deliver simpler, more secure sign-ins. The post World Passkey Day: Advancing passwordless authentication appeared first on Microsoft Security Blog. This article has…
ClickFix campaign uses fake macOS utilities lures to deliver infostealers
Threat actors are targeting macOS users with fake utility fixes that trick them into running malicious Terminal commands. This campaign evades traditional defenses by stealing credentials, wallets, and sensitive data. The post ClickFix campaign uses fake macOS utilities lures to…
Microsoft named an overall leader in KuppingerCole Analyst’s 2026 Emerging AI Security Operations Center (SOC) report
Microsoft is excited to be named an Overall Leader, and the Market Leader in the Kuppinger Cole Analyst’s 2026 Emerging AI Security Operations Center (SOC) report, as we see automation and AI as core components of the future of cybersecurity.…
Breaking the code: Multi-stage ‘code of conduct’ phishing campaign leads to AiTM token compromise
Microsoft Defender Research observed a large-scale credential theft campaign that exemplifies this trend, using code of conduct-themed lures, a multi-step attack chain, and legitimate email services to distribute fully authenticated messages from attacker-controlled domains. The post Breaking the code: Multi-stage…
CVE-2026-31431: Copy Fail vulnerability enables Linux root privilege escalation across cloud environments
A high-severity Linux vulnerability, “Copy Fail” (CVE-2026-31431), enables root privilege escalation across cloud environments and Kubernetes workloads. With a working exploit already in the wild, organizations should act quickly to detect, mitigate, and reduce risk. The post CVE-2026-31431: Copy Fail…