Evaluates the severity of threats based on asset value and vulnerability data. How They Work Together
Open Source Security Information Management by AlienVault (now AT&T Cybersecurity). It acts as a SIEM (Security Information and Event Management) platform that:
An open-source Host-based Intrusion Detection System (HIDS). It sits on your servers and endpoints to perform: OSSEC & OSSIM Unified Open Source Security
Connects seemingly unrelated events from different sources to identify complex attack patterns.
Automatically blocking threats (e.g., firewalling a malicious IP) in real time. Evaluates the severity of threats based on asset
Detecting unauthorized changes to critical system files. Rootkit Detection: Identifying hidden malicious software.
The "unified" approach relies on the specific strengths of each tool working in tandem: OSSEC & OSSIM Unified Open Source Security
AlienVault OSSIM Reviews & Ratings 2026 | Gartner Peer Insights