Insider Threats in Cyber Security: How to Detect & Prevent | UpGuard

This report is a practical overview of insider threats covering definitions, real-world examples of insider-caused data leaks, categories of insider actors (e.g., inadvertent insiders, disgruntled employees, moles), common digital and behavioral indicators of compromise, monitoring/detection approaches (SIEM, UEBA), and a set of preventative controls (DLP, MFA, behavioral analytics, employee screening and policy review). It emphasizes the difficulty of detecting insider threats, their high potential cost, and recommends holistic, real-time human-risk assessment combined with traditional security controls.