FINT-4350 - Install a file integrity tool
To monitor for unauthorized changes, a file integrity tool can help with the detection of such event. Each time the contents or the properties of a file change, it will have a different checksum. With regular checks of the related integrity database, discovering changes becomes easy.Install a tool like AIDE, Samhain or Tripwire to monitor important system and data files. Additionally configure the tool to alert system or security personnel on events.
How to solve
Install a tool like AIDE to help monitoring file changes. Good monitoring will ensure that both authorized changes are properly documented, and unauthorized changes are detected early.
Tip: when possible, link events to a (security) monitoring system, or your ITIL problem management. Especially unauthorized changes need a root cause analysis, or trigger incident response.
Linux and Unix System Hardening
This information is provided as part of the Lynis community project. It is related to Lynis control FINT-4350. All information should be considered as-is, without guarantees. Any advice or snippets should be tested before implementing in production environments.
Lynis is a technical security audit tool for systems running Linux, UNIX, *BSD, and macOS. It is open source software and free to use. The project has an active community, and can also be found on GitHub.
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