Event Viewer must be protected from unauthorized modification and deletion.

From Windows Server 2016 Security Technical Implementation Guide

SV-88063r1_rule Event Viewer must be protected from unauthorized modification and deletion.

Vulnerability 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.

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