Control: 2.1.20 Ensure That 'Notify about alerts with the following severity' is Set to 'High'

Description

Enables emailing security alerts to the subscription owner or other designated security contact.

Enabling security alert emails ensures that security alert emails are received from Microsoft. This ensures that the right people are aware of any potential security issues and are able to mitigate the risk.

Remediation

From Azure Portal

From Azure Home select the Portal Menu.
Select Microsoft Defender for Cloud.
Click on Environment Settings.
Click on the appropriate Management Group, Subscription, or Workspace.
Click on Email notifications.
Under Notification types, check the check box next to Notify about alerts with the following severity (or higher): and select High from the drop down menu.
Click Save.

From Azure CLI

Use the below command to set Send email notification for high severity alerts to On.

az account get-access-token --query
"{subscription:subscription,accessToken:accessToken}" --out tsv | xargs -L1 bash -c 'curl -X PUT -H "Authorization: Bearer $1" -H "Content-Type:
application/json"
https://management.azure.com/subscriptions/<$0>/providers/Microsoft.Security/ securityContacts/default1?api-version=2017-08-01-preview -d@"input.json"'

Where input.json contains the data below, replacing validEmailAddress with a single email address or multiple comma-separated email addresses:

{
  "id":"/subscriptions/<Your_Subscription_Id>/providers/Microsoft.Security/securityC ontacts/default1",
  "name": "default1",
  "type": "Microsoft.Security/securityContacts",
  "properties": {
    "email": "<validEmailAddress>",
    "alertNotifications": "On",
    "alertsToAdmins": "On"
  }
}

Default Value

By default, Notify about alerts with the following severity (or higher): is set to High.

Usage

Run the control in your terminal:

powerpipe control run azure_compliance.control.cis_v200_2_1_20

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run azure_compliance.control.cis_v200_2_1_20 --share

SQL

This control uses a named query:

with contact_info as (
  select
    count(*) filter (where alert_notifications = 'On') as notification_alert_count,
    subscription_id
  from
    azure_security_center_contact
  group by
    subscription_id
  limit 1
)
select
  sub.subscription_id as resource,
  case
    when notification_alert_count > 0 then 'ok'
    else 'alarm'
  end as status,
  case
    when notification_alert_count > 0 then '"Notify about alerts with the following severity" set to High.'
    else '"Notify about alerts with the following severity" not set to High.'
  end as reason
  
  , sub.display_name as subscription
from
  azure_subscription sub
  left join contact_info ci on sub.subscription_id = ci.subscription_id;