Title

Event Viewer must be protected from unauthorized modification and deletion. (Cat II impact)

Discussion

Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. Operating systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing the tools and the corresponding rights the user enjoys in order to make access decisions regarding the modification or deletion of audit tools. Satisfies: SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Check Content

Navigate to "%SystemRoot%\System32". View the permissions on "Eventvwr.exe". If any groups or accounts other than TrustedInstaller have "Full control" or "Modify" permissions, this is a finding. The default permissions below satisfy this requirement: TrustedInstaller - Full Control Administrators, SYSTEM, Users, ALL APPLICATION PACKAGES, ALL RESTRICTED APPLICATION PACKAGES - Read & Execute

Fix Text

Configure the permissions on the "Eventvwr.exe" file to prevent modification by any groups or accounts other than TrustedInstaller. The default permissions listed below satisfy this requirement: TrustedInstaller - Full Control Administrators, SYSTEM, Users, ALL APPLICATION PACKAGES, ALL RESTRICTED APPLICATION PACKAGES - Read & Execute The default location is the "%SystemRoot%\ System32" folder.

Additional Identifiers

Rule ID: SV-224880r991558_rule

Vulnerability ID: V-224880

Group Title: SRG-OS-000257-GPOS-00098

Expert Comments

CCIs tied to check.

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