Tanium must notify System Administrators and Information System Security Officers for account removal actions.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-78639	SRG-APP-000294	TANS-CN-000033	SV-93345r1_rule	2018-07-09	1

Description
When application accounts are removed, user accessibility is affected. Accounts are used for identifying individual application users or for identifying the application processes themselves. In order to detect and respond to events that affect user accessibility and application processing, applications must audit account removal actions and, as required, notify the appropriate individuals so they can investigate the event. Such a capability greatly reduces the risk that application accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. To address access requirements, many application developers choose to integrate their applications with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements. Such integration allows the application developer to off-load those access control functions and focus on core application features and functionality.

Description

When application accounts are removed, user accessibility is affected. Accounts are used for identifying individual application users or for identifying the application processes themselves. In order to detect and respond to events that affect user accessibility and application processing, applications must audit account removal actions and, as required, notify the appropriate individuals so they can investigate the event. Such a capability greatly reduces the risk that application accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. To address access requirements, many application developers choose to integrate their applications with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements. Such integration allows the application developer to off-load those access control functions and focus on core application features and functionality.

ℹ️ Check
Using a web browser on a system that has connectivity to Tanium, access the Tanium web user interface (UI) and log on with CAC. Click on the navigation button (hamburger menu) on the top left of the console. Click on "Connect". Review the configured Sources. If no "Sources" exists to send audit logs from the Tanium SQL Server to a SIEM tool, this is a finding. Work with the SIEM administrator to determine if an alert is configured when accounts are deleted. If there is no alert configured, this is a finding.

ℹ️ Check

Using a web browser on a system that has connectivity to Tanium, access the Tanium web user interface (UI) and log on with CAC. Click on the navigation button (hamburger menu) on the top left of the console. Click on "Connect". Review the configured Sources. If no "Sources" exists to send audit logs from the Tanium SQL Server to a SIEM tool, this is a finding. Work with the SIEM administrator to determine if an alert is configured when accounts are deleted. If there is no alert configured, this is a finding.

✔️ Fix
Using a web browser on a system that has connectivity to Tanium, access the Tanium web UI and log on with CAC. Click on the navigation button (hamburger menu) on the top left of the console. Click on "Connect". Configure "Sources" to send audit logs from the Tanium SQL Server to a SIEM tool. Work with the SIEM administrator to configure an alert when accounts are deleted.