|Platform: win2016||Date: (C)2017-08-03 (M)2018-03-26|
"Audit Policy: Logon-Logoff: Logoff"
This subcategory reports when a user logs off from the system. These events occur on the accessed computer. For interactive logons, the generation of these events occurs on the computer that is logged on to. If a network logon takes place to access a share, these events generate on the computer that hosts the accessed resource. If you configure this setting to No auditing, it is difficult or impossible to determine which user has accessed or attempted to access organization computers. Events for this subcategory include:
- 4634: An account was logged off.
- 4647: User initiated logoff.
Refer to the Microsoft Knowledgebase article "Description of security events in Windows Vista and in Windows Server 2008" for the most recent information about this setting: http://support.microsoft.com/kb/947226.
If audit settings are not configured, it can be difficult or impossible to determine what occurred during a security incident. However, if audit settings are configured so that events are generated for all activities the Security log will be filled with data and hard to use. Also, you can use a large amount of data storage as well as adversely affect overall computer performance if you configure audit settings for a large number of objects.
If failure auditing is used and the Audit: Shut down system immediately if unable to log security audits setting in the Security Options section of Group Policy is enabled, an attacker could generate millions of failure events such as logon failures in order to fill the Security log and force the computer to shut down, creating a denial of service (DoS). If security logs are allowed to be overwritten, an attacker can overwrite part or all of their activity by generating large numbers of events so that the evidence of their intrusion is overwritten.
Enable Audit policy settings that support the organizational security policy for all the computers in your organization. Identify the components that you need for an audit policy that enables your organization to hold users accountable for their actions while using organizational resources and enables IT departments to detect unauthorized activity efficiently and then track those events in log files.
If no audit settings are configured, or if audit settings are too lax on the computers in your organization, security incidents might not be detected or not enough evidence will be available for network forensic analysis after security incidents occur. However, if audit settings are too severe, critically important entries in the Security log may be obscured by all of the meaningless entries and computer performance and the available amount of data storage may be seriously affected. Companies that operate in certain regulated industries may have legal obligations to log certain events or activities.
(1) GPO: Computer Configuration\Windows Settings\Security Settings\Advanced Audit Policy Configuration\Audit Policies\Logon/Logoff
(2) REG: No Registry Info
|SCAP Repo OVAL Definition||oval:org.secpod.oval:def:40275|