GEN000220 - A file integrity tool must be used at least weekly to check for unauthorized file changes.
Changes in system libraries and binaries can indicate compromise or significant system events, such as patching needing to be checked by automated processes and the results reviewed by the SA. NOTE: For MAC I systems, increase the frequency to daily. NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Create a cron job, scheduled to run weekly or more frequently, to run the file integrity tool to check for unauthorized system libraries or binaries, or unauthorized modification to authorized system libraries or binaries. NOTE: For MAC I systems, increase the frequency to daily.