4.1.9 Ensure session initiation information is collected - '/var/log/btmp'

Information

Monitor session initiation events. The parameters in this section track changes to the files associated with session events. The file /var/run/utmp file tracks all currently logged in users. The /var/log/wtmp file tracks logins, logouts, shutdown, and reboot events. All audit records will be tagged with the identifier 'session.' The file /var/log/btmp keeps track of failed login attempts and can be read by entering the command /usr/bin/last -f /var/log/btmp. All audit records will be tagged with the identifier 'logins.' Monitoring these files for changes could alert a system administrator to logins occurring at unusual hours, which could indicate intruder activity (i.e. a user logging in at a time when they do not normally log in).

Solution

Add the following lines to the /etc/audit/audit.rules file: -w /var/run/utmp -p wa -k session-w /var/log/wtmp -p wa -k session-w /var/log/btmp -p wa -k session

See Also

https://workbench.cisecurity.org/files/1866