🔍 Free Insider Threat Detection Tools CISOs Can’t Ignore 🔍

Not every threat comes from the outside – some of the most costly breaches start with insiders, whether accidental or malicious. The good news? There are free and open-source tools CISOs can use today to strengthen insider threat visibility.

Here are some to explore:

1️⃣ OSSEC – Open-source HIDS that monitors log files, rootkits, registry changes, and suspicious activity.
🔗 https://www.ossec.net

2️⃣ Wazuh – SIEM + threat detection platform with powerful log analysis and insider risk visibility.
🔗 https://wazuh.com

3️⃣ Graylog (Open) – Log management for monitoring anomalous patterns that may indicate insider misuse.
🔗 https://www.graylog.org

4️⃣ Zeek (formerly Bro) – Network monitoring framework that can flag unusual internal data flows.
🔗 https://zeek.org

5️⃣ TheHive – Open-source SOC platform for incident response with insider threat detection workflows.
🔗 https://thehive-project.org

6️⃣ Prelude OSS – Hybrid IDS that supports insider activity monitoring and alert correlation.
🔗 https://www.prelude-siem.org

7️⃣ Sysmon (Microsoft Sysinternals) – Tracks detailed process, file, and registry activity for insider behavior detection.
🔗 https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon

⚡ Takeaway: Insider threats are harder to spot than external attacks because they often look like legitimate activity. These free tools give CISOs eyes inside the perimeter without blowing budgets.

At AUMINT.io, we go further – by simulating social engineering and insider-like attack vectors to see how employees react, then delivering targeted awareness to stop the threat at its source.

🔗 Ready to uncover how your employees would respond to insider-style scenarios? Book a free demo

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