SLEM 5 must generate audit records for all modifications to the "lastlog" file.

Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.

Audit records can be generated from various components within the information system (e.g., module or policy filter).

Verify SLEM 5 generates an audit record when all modifications to the "lastlog" file occur with the following command:

     > sudo auditctl -l | grep -w '/var/log/lastlog'
     -w /var/log/lastlog -p wa -k logins

If the command does not return a line that matches the example or the line is commented out, this is a finding.

Note: The "key=" value is arbitrary and can be different from the example output above.

Configure SLEM 5 to generate an audit record for any all modifications to the "lastlog" file occur.

Add or modify the following line in the "/etc/audit/rules.d/audit.rules" file:

-w /var/log/lastlog -p wa -k logins

To reload the rules file, restart the audit daemon:

     > sudo systemctl restart auditd.service

or issue the following command:

     > sudo augenrules --load