Insider threats and privilege abuse are replacing perimeter-focused attacks as the primary cybersecurity threat. SECUREiNFO (Samart Telecom) warns Thai organizations that attackers now impersonate legitimate users to steal data undetected by traditional security systems. The firm recommends five key strategies: Zero Trust Architecture with Multi-Factor Authentication, 24/7 SOC and Managed Detection & Response, third-party vendor risk management, employee security awareness training, and incident response planning aligned with PDPA and regulatory requirements.