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Latest threat analysis, industry news, and security best practices from our expert team.

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sigma-rule259 articles
Jun 18, 2026

Orphaned AI Agents: Detecting and Remediating Shadow AI Access Risks

Orphaned AI Agents: Detecting and Remediating Shadow AI Access Risks Introduction The rapid adoption of generative AI and autonomous agents ...

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Vulnerability ManagementRead Now
Jun 18, 2026

Crypto Clipper Campaign: Defending Against AI-Driven Social Engineering and Fake Repositories

Introduction Security analysts are currently facing a sophisticated evolution in social engineering tactics. A new campaign, identified by C...

sigma-rulekql-detectionthreat-hunting
Incident ResponseRead Now
Jun 16, 2026

NarwhalRAT Delivery via Fake Microsoft Account Alerts — Detection and Incident Response

NarwhalRAT Delivery via Fake Microsoft Account Alerts — Detection and Incident Response Introduction Security Arsenal has detected a concern...

sigma-rulekql-detectionthreat-hunting
Incident ResponseRead Now
Jun 15, 2026

Winning the 72-Minute Race: AI-Driven SOC Defense and Automation Strategies

Winning the 72-Minute Race: AI-Driven SOC Defense and Automation Strategies Introduction The metrics for incident response have shifted irre...

sigma-rulekql-detectionthreat-hunting
SOC & MDRRead Now
Jun 15, 2026

Maine Data Breach Portal Disruption: Defending Public Forms Against Automated Abuse

Introduction The recent shutdown of the Maine Attorney General's online data breach notification portal serves as a stark warning to securit...

sigma-rulekql-detectionthreat-hunting
Vulnerability ManagementRead Now
Jun 14, 2026

Anthropic Fable 5 & Mythos 5 Takedown: Managing AI Vendor Risk Under New Export Controls

Introduction Anthropic has abruptly taken its Fable 5 and Mythos 5 large language models (LLMs) offline. This action is in direct response t...

sigma-rulekql-detectionthreat-hunting
Platform & AutomationRead Now
Jun 14, 2026

Securing Claude Mythos 5 and Fable 5: Defending Against LLM Prompt Injection

Introduction Anthropic's release of Claude Mythos 5 and Fable 5 marks a significant evolution in large language model (LLM) capabilities, bu...

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Vulnerability ManagementRead Now
Jun 13, 2026

Maine Breach Portal Abuse: Web Application Integrity and Input Validation Defense

Maine Breach Portal Abuse: Web Application Integrity and Input Validation Defense Introduction The State of Maine recently disabled its publ...

sigma-rulekql-detectionthreat-hunting
Vulnerability ManagementRead Now
Jun 13, 2026

Velvet Ant Linux Backdoor: Detection and Remediation of PAM and OpenSSH Compromise

Velvet Ant Linux Backdoor: Detection and Remediation of PAM and OpenSSH Compromise By Senior Security Consultant, Security Arsenal Introduct...

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Vulnerability ManagementRead Now
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