Title

System files must be monitored for unauthorized changes. (Cat II impact)

Discussion

Monitoring system files for changes against a baseline on a regular basis may help detect the possible introduction of malicious code on a system.

Check Content

Determine whether the system is monitored for unauthorized changes to system files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) against a baseline on a weekly basis. A properly configured and approved DoD HBSS solution that supports a File Integrity Monitor (FIM) module will meet the requirement for file integrity checking. If system files are not monitored for unauthorized changes, this is a finding. A properly configured HBSS Policy Auditor 5.2 or later File Integrity Monitor (FIM) module will meet the requirement for file integrity checking. The Asset module within HBSS does not meet this requirement.

Fix Text

Monitor the system for unauthorized changes to system files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) against a baseline on a weekly basis. This can be done with the use of various monitoring tools.

Additional Identifiers

Rule ID: SV-224840r569239_rule

Vulnerability ID: V-224840

Group Title: SRG-OS-000363-GPOS-00150

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.