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An analyst wants to detect unauthorized changes in Azure or Entra ID. Using the Azure Event Hub collector to send identity and access logs to Devo, the analyst will find privilege escalation events. As a result, the analyst will remove malicious accounts, preventing them from disabling or modifying Azure resources.
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Table | Description |
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Data from Event Hubs, VM Metrics, Entra ID, and other sources. | |
cloud.azure.service.type | For most Azure services, there is a separate table for each type of log associated with that service. |
cloud.azure.ad.* | Entra ID identity and access management logs. |
cloud.azure.ad.signin_all | This union table combines all the different Entra ID authentication logs. |
Authentication logs, including Entra ID and Azure SQL authentication. | |
Web activity, including Azure Application Gateway. | |
Firewall activity, including Azure Firewall | |
DNS activity, including Azure Firewall DNS Proxy. |
Authorize It
Previous requisites
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Access to Entra ID.
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To perform the authorization, the Entra Security Administrator role is required.
Items required before authorizing an Event Hub:
Subscription containing your Azure resources.
Resource group containing your Azure resources.
Name of the region containing Azure resources. Example: East US
Entra directory.
If you have more than one set of these items, then authorize an Event Hub for each set.
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Items created or used during the authorization process:
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In Azure Portal, search for Entra ID.
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Click App registrations in the left menu and click new registration
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Register the application
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Search for the Event Hubs service and click on it.
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Click Create.
Select the subscription and resource group corresponding to the resources that must be monitored.
Enter a name.
In the Location field, select the region containing the resources that must be monitored.
To capture Blob or Data Lake, see How Event Hubs Capture is charged to select a tier. Otherwise, select the cheapest tier and one throughput unit. If you need more resources, they can be added later.
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Select
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“Review+Create,” then
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“Create.”
Return to Event Hubs and open the namespace created in the previous steps.
Select Access control (IAM) in the left menu, click Add, and click Add Access Role Assignment.
Search for the Azure Event Hubs Data Receiver role and select it and then click Next.
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Click Select members and search for the previously created App registration.
Select the Application by clicking its name.
Once the application is already listed as a selected member, click Select.
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Click Review + Assign.
In the namespace,
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Create a shared access policy for sending data to the event hub.
Create a second shared access policy for listening to the event hub.
Open the listen policy and copy the primary connection string.
Return to the event hub and check the list of consumer groups. The Devo collector must have a dedicated consumer group. Devo recommends using the
$Defaultconsumer group for the collector without allowing other entities to use the event hub.
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If the consumer group is shared with other entities, data will be lost.
Send Data
Enable Monitor to get audit, reliability, metrics, and Microsoft recommendation data.
Enable Entra ID to get authentication data.
Use an SDK to send JSON data from your custom applications.
Use HTTPs to send JSON data.
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For each event hub, the consumer group should only be used by one collector. If the consumer group is shared with other entities, data will be lost. To check if your collector has been enabled successfully, validate it.
Secure It
Devo Exchange provides different Alerts Packs to help you monitor Azure data:
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Platform alert pack: Azure detects when an attacker is trying to attack Microsoft Azure environments.
an Azure alert pack. The Authentication alert pack works with Entra ID data.
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The Collective Defense alert pack works with Azure Application Gateway and Azure Firewall.
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The DNS alert pack works with Azure Firewall DNS proxy.
Entra ID
See Entra ID collector.
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Create an inactivity alert to detect interruptions in the of transfer of data transfer from the source to the event hub using the query.
| Code Block |
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from cloud.azure where toktains(hostchain,"collector-") select split(hostchain,"-",1) as collector_id |
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