CIS Control 6: Maintenance, Monitoring and Analysis of Audit Logs
The focus of this control is to collect, manage, and analyze audit logs of events that could help detect, understand, or recover from an attack.
The CIS states this Control is critical:
“Deficiencies in security logging and analysis allow attackers to hide their location, malicious software, and activities on victim machines. Even if the victims know that their systems have been compromised, without protected and complete logging records they are blind to the details of the attack and to subsequent actions taken by the attackers. Without solid audit logs, an attack may go unnoticed indefinitely and the particular damages done may be irreversible. Sometimes logging records are the only evidence of a successful attack. Many organizations keep audit records for compliance purposes, but attackers rely on the fact that such organizations rarely look at the audit logs, and they do not know that their systems have been compromised.
Because of poor or nonexistent log analysis processes, attackers sometimes control victim machines for months or years without anyone in the target organization knowing, even though the evidence of the attack has been recorded in unexamined log files.”
The journey of implementing the CIS Controls continues with the Maintenance, Monitoring and Analysis of Audit Logs. Organizations are directed to ensure that local logging has been enabled on all systems and networking devices. The specific sub-controls that are part of Implementation Group 1 (IG1) are: