Control: 4.1.6 Ensure that 'Auditing' Retention is 'greater than 90 days'

Description

SQL Server Audit Retention should be configured to be greater than 90 days.

Audit Logs can be used to check for anomalies and give insight into suspected breaches or misuse of information and access.

Remediation

From Azure Console

Go to SQL servers.
For each server instance.
Click on Auditing.
If storage is selected, expand Advanced properties.
Set the Retention (days) setting greater than 90 days or 0 for unlimited retention.
Select Save.

From Powershell

For each Server, set retention policy to more than 90 days

Log Analytics Example

Set-AzSqlServerAudit -ResourceGroupName <resource group name> -ServerName <SQL Server name> -RetentionInDays <Number of Days to retain the audit logs, should be more than 90 days> -LogAnalyticsTargetState Enabled - WorkspaceResourceId "/subscriptions/<subscription ID>/resourceGroups/insights- integration/providers/Microsoft.OperationalInsights/workspaces/<workspace name>

Event Hub Example

Set-AzSqlServerAudit -ResourceGroupName "<resource group name>" -ServerName "<SQL Server name>" -EventHubTargetState Enabled -EventHubName
"<Event Hub name>" -EventHubAuthorizationRuleResourceId "<Event Hub Authorization Rule Resource ID>"

Blob Storage Example*

Set-AzSqlServerAudit -ResourceGroupName "<resource group name>" -ServerName "<SQL Server name>" -BlobStorageTargetState Enabled
-StorageAccountResourceId "/subscriptions/<subscription_ID>/resourceGroups/<Resource_Group>/providers/M icrosoft.Stora
ge/storageAccounts/<Storage Account name>"

Default Value

By default, SQL Server audit storage is disabled.

Usage

Run the control in your terminal:

powerpipe control run azure_compliance.control.cis_v200_4_1_6

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run azure_compliance.control.cis_v200_4_1_6 --share

SQL

This control uses a named query:

sql_server_auditing_retention_period_90