Cis Azure Foundations 6.1.2.11

Ensure that an Activity Log Alert exists for Service Health

Description

Create an activity log alert for Service Health.

Rationale

Monitoring for Service Health events provides insight into service issues, planned maintenance, security advisories, and other changes that may affect the Azure services and regions in use.

Impact

There is no charge for creating activity log alert rules.

Audit Procedure

Using Azure Portal

1. Go to Monitor.
2. Click Alerts.
3. Click Alert rules.
4. Ensure an alert rule exists for a subscription with Condition set to Service names=All, Event types=All and Target resource type set to Subscription.
5. If an alert rule is found for step 4, click the name of the alert rule.
6. Ensure the Actions panel displays an action group configured to notify appropriate personnel.
7. Repeat steps 1-6 for each subscription.

Using Azure CLI

Run the following command to list activity log alerts:

az monitor activity-log alert list --subscription <subscription-id>

For each activity log alert, run the following command:

az monitor activity-log alert show --subscription <subscription-id> --resource-group <resource-group> --activity-log-alert-name <activity-log-alert>

Ensure an alert exists for ServiceHealth with scopes set to a subscription ID.

Repeat for each subscription.

Using PowerShell

Run the following command to locate ServiceHealth alert rules for a subscription:

Get-AzActivityLogAlert -SubscriptionId <subscription-id> | where-object {$_.ConditionAllOf.Equal -match "ServiceHealth"} | select-object Location,Name,Enabled,ResourceGroupName,ConditionAllOf

Ensure that at least one ServiceHealth alert rule is returned.

Repeat for each subscription.

Expected Result

An activity log alert rule should exist for Service Health with ServiceHealth category and an action group assigned to notify appropriate personnel.

Remediation

Remediate from Azure Portal

1. Go to Monitor.
2. Click Alerts.
3. Click + Create.
4. Select Alert rule from the drop-down menu.
5. Choose a subscription.
6. Click Apply.
7. Select the Condition tab.
8. Click See all signals.
9. Select Service health.
10. Click Apply.
11. Open the drop-down menu next to Event types.
12. Check the box next to Select all.
13. Select the Actions tab.
14. Click Select action groups to select an existing action group, or Create action group to create a new action group.
15. Follow the prompts to choose or create an action group.
16. Select the Details tab.
17. Select a Resource group, provide an Alert rule name and an optional Alert rule description.
18. Click Review + create.
19. Click Create.
20. Repeat steps 1-19 for each subscription requiring remediation.

Remediate from Azure CLI

For each subscription requiring remediation, run the following command to create a ServiceHealth alert rule for a subscription:

az monitor activity-log alert create --subscription <subscription-id> --resource-group <resource-group> --name <alert-rule> --condition category=ServiceHealth and properties.incidentType=Incident --scope /subscriptions/<subscription-id> --action-group <action-group>

Remediate from PowerShell

Create the Conditions object:

$conditions = @()
$conditions += New-AzActivityLogAlertAlertRuleAnyOfOrLeafConditionObject -Field category -Equal ServiceHealth
$conditions += New-AzActivityLogAlertAlertRuleAnyOfOrLeafConditionObject -Field properties.incidentType -Equal Incident

Retrieve the Action Group information and store in a variable:

$actionGroup = Get-AzActionGroup -ResourceGroupName <resource-group> -Name <action-group>
$actionObject = New-AzActivityLogAlertActionGroupObject -Id $actionGroup.Id

Create the Scope object:

$scope = "/subscriptions/<subscription-id>"

Create the activity log alert rule:

New-AzActivityLogAlert -Name <alert-rule> -ResourceGroupName <resource-group> -Condition $conditions -Scope $scope -Location global -Action $actionObject -Subscription <subscription-id> -Enabled $true

Repeat for each subscription requiring remediation.

Default Value

By default, no monitoring alerts are created.

References

1. https://learn.microsoft.com/en-us/azure/service-health/overview
2. https://learn.microsoft.com/en-us/azure/service-health/alerts-activity-log-service-notifications-portal
3. https://azure.microsoft.com/en-us/pricing/details/monitor/#faq
4. https://learn.microsoft.com/en-us/cli/azure/monitor/activity-log/alert
5. https://learn.microsoft.com/en-us/powershell/module/az.monitor/get-azactivitylogalert
6. https://learn.microsoft.com/en-us/powershell/module/az.monitor/new-azactivitylogalert

CIS Controls

MITRE ATT&CK Mappings

Profile

Level 1 | Automated