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On this page
  • Overview
  • Azure Sentinel Integration - High-level Steps
  • Azure Sentinel Configuration
  • Azure Configuration Summary
  • Oort Tenant Configuration for Sentinel
  • Viewing your Oort logs in Azure Sentinel
  1. Configuring Integrations

Azure Sentinel SIEM Integration

2023.03.23

PreviousAzure Event Hub Log Streaming for Microsoft Entra ID (Azure AD)NextAWS

Last updated 10 months ago

Overview

Oort’s platform can tie into existing Sentinel workflows often used by Security Teams. This document will walk you through the process of setting up the App Registration inside of Azure AD.

For more information, see this short overview video -

Azure Sentinel Integration - High-level Steps

The following items will be needed to complete the integration inside of the Oort Console:

The sections below go into more detail on each of the steps.

Azure Sentinel Configuration

    1. Save content of this block in a local file or download the sample_data file linked below. NOTE - this step is done outside of the Azure console.

    [{
            "activity": "END_USER__CHECK_FAILED",
            "targetResourceIds": {
                    "checkId": "no-mfa",
                    "login": "ciuser-noreply+cnt-dev-1661195950711@oort.io",
                    "userIds": ["28a8cf1a-9ff8-457c-8049-1dee4caa3177"]
            },
            "lastModified": "2022-11-02T12:28:07.850Z"
    }]

  1. Click Browse for files and use the content of the file from the previous step for that purpose.

  2. source
    | extend TimeGenerated = todatetime(['lastModified'])
    | project-rename activityDate = lastModified

Azure Configuration Summary

After the setup above, you will have the following components in your Azure tenant. These objects will be used to setup a corresponding Sentinel SIEM integration in Oort:

  • App registration (client ID, client secret, tenant ID)

  • Logs Ingestion Endpoint URI from the data collection endpoint (DCE) to receive data over HTTP

  • Data collection rule (DCR) immutable Id

  • Custom table name in Log Analytics workspace (including the _CL suffix)

Oort Tenant Configuration for Sentinel

Within your Oort console, follow these steps to configure your Sentinel integration.

    1. Name - for display purposes only

    2. Description (optional)

    3. Azure directory (tenant) ID

    4. App (client) ID

    5. App (client) secret

    6. Logs Ingestion Endpoint URI - this is a property of the data collection endpoint (DCE) created above

    7. Custom log table name

    8. DCR Immutable ID - this is found in the JSON View of the DCR

  1. Click Save

Viewing your Oort logs in Azure Sentinel

By default, your Oort tenant will send all new Check failures for all checks to your Azure Sentinel custom table once every 24 hours.

To calculate any new check failures since the last data collection and analysis, you may want to do the following:

To view your logs in Azure Sentinel, do the following -

  1. Navigate to your Azure Sentinel instance that contains the configuration you created for this integration.

  2. Select Logs in the left nav pane.

  3. The Results will show the most recent check failures from your Oort tenant.

This article follows the Microsoft Azure Sentinel tutorial - .

Configure Azure application registration to authenticate against the API, . Note the Application (client) ID, Directory (tenant) ID and secret value for further setup.

Create data collection endpoint, . Note the Logs ingestion URI for further setup.

Add a custom log table, . Note the table name for further setup and be aware that there is _CL added automatically to the table name. We will need the full name with the _CL suffix.

After clicking Next, the next step is to parse and filter a sample data set. In the Schema and transformation screen, review the as a reference and then complete the process using the data and steps below. Do not use the sample data and transform code provided in the Microsoft article. Use the the steps below.

Data from the sample file is displayed with a warning that a TimeGenerated is not in the data. Click Transformation editor to open the transformation and paste content of the below block (note that source is already present in the editor UI):

Click Run to view the results, click Apply to save the transformation, Next to get to the Review tab, and click Create to save the custom log.

To collect information from data collection rule (DCR), . Note immutableId for further setup.

Next to assign permissions to the DCR, . In the end, you will see your App Registration as a Monitoring Metrics Publisher under the Role Assignments tab.

On the Integrations page, click Add Integration and scroll to the bottom of the page to select Azure Sentinel.

Enter the information collected as shown below -

On the Integrations page, click the 3-dot menu for the Sentinel integration and select Test Connectivity.

From the Integrations page, manually run collection from your Azure data integration using the Collect Now option.

After that completes, from the Checks page, select Run Checks Now

Under Queries, run a new query with the name of the custom table created for this purpose.

Expand individual rows of the results table to see details for each item.

Send data to Azure Monitor Logs by using a REST API (Azure Portal)
follow the instructions
follow the instructions
follow the instructions
follow the instructions
🧩
Microsoft instructions
follow the instructions
330B
Sentinel_sample_data_Oort.json
SIEM Integration - Azure Sentinel
SIEM Integration - Azure Sentinel
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