Atomic OSSEC is an extended detection and response (XDR) system that provides centralized antivirus (AV) and antimalware management for server endpoints. It is built on top of the open-source ClamAV engine, extending it with enterprise-grade capabilities including centralized management, logging, and scheduled scanning. The solution supports a wide range of operating systems, including Linux (Red Hat 5, Ubuntu 16), Windows (including Windows XP), macOS, and Unix variants (AIX, Solaris 11, HP-UX 11i). It is designed for both modern and end-of-life (EOL) systems. Key functional areas include: - Real-time file integrity monitoring (FIM) and behavioral analysis - Memory scanning, which monitors activity at the OS level rather than only the file system - Malware detection covering viruses, trojans, worms, rootkits, and bots - Lateral movement prevention through east-west payload monitoring and endpoint isolation - Load optimization, with a reported 92% reduction in memory usage on Linux and AIX compared to standard ClamAV - Built-in update management with patch alerts, patch automation, and event analysis - A GUI for SIEM analysis, security orchestration, compliance reporting, and artifact capture for auditing Atomic OSSEC is positioned as a defense-in-depth tool for server environments, addressing threats such as compromised endpoints, software supply chain infiltration, insider threats, and EOL system vulnerabilities. A 14-day free trial is available.