Microsoft Sentinel

Microsoft Sentinel

{% hint style="success" %} Microsoft Sentinel is an SIEM integration. SIEM integrations are used to perform analysis of any SIEM generated alerts, and/or to use generated data as part of investigation analysis. {% endhint %}

The Dropzone platform integrates with the Microsoft Sentinel security SIEM. Many customers ingest other alert sources into Microsoft Sentinel (e.g. IDPs) and integrate Dropzone into Microsoft Sentinel rather than the source systems.

Integration Overview

To enable these integrations you will perform the following actions:

• Register a new application in Microsoft Entra Admin
• Locate your Client ID, Tenant ID, and create a Client Secret
• Assign necessary API permissions to the application
• Assign roles to the application in Microsoft Sentinel
• Locate your Workspace Name and Workspace ID

See the Microsoft Integrations page for instructions on how to register a new application, locate your Client ID and Tenant ID, and to create a Client Secret.

Set Application Permissions

General instructions on how to assign API permissions to the application can be found in the Microsoft Integrations page.

Enabling MS Sentinel will require the following APIs and permissions:

To add the Log Analytics API, do the following:

• In the API permissions page, click "Add a permission"
• Navigate to "APIs my organization uses"
• In the search bar, input "Log Analytics API," and select it

• Click "Application permissions"
• In the search bar, input "Data.Read" and select it. Click "Add permissions"

• Once back in the Application API permissions page, click "Grant admin consent for [mycompany.net]"

• Click "Yes"

If your integration requires access to security alerts via Microsoft Graph, do the following:

• In the API permissions page, click "Add a permission"
• Under the Microsoft API header, select "Microsoft Graph"

• Click "Application permissions"
• Check the permission "SecurityEvents.Read.All," then click "Add permissions"

• Once back in the Application API permissions page, click "Grant admin consent for [mycompany.net]"

• Click "Yes"

Assign Roles in Microsoft Sentinel

To allow the application to access Microsoft Sentinel data, you must assign the application roles based on your desired access level.

• Navigate to your Azure portal
• Under the "Azure Services" heading, navigate to Microsoft Sentinel

• Select the Log Analytics Workspace you wish to analyze

• Navigate to Configuration > Settings

• Click on "Workspace settings"

• Navigate to "Access control (IAM)"

• Select Add > Add role assignment

• Select a role based on your desired access level:
  • Read-only access: Log Analytics Reader or Microsoft Sentinel Reader
  • Read and write access: Microsoft Sentinel Responder or Microsoft Sentinel Contributor

{% hint style="info" %} If you wish to enable Ticket Sync, you must assign the application a Read and write access role. {% endhint %}

{% hint style="info" %} For the purpose of this documentation, the Log Analytics Reader role has been selected. {% endhint %}

• Once you have selected your role, click "Members"
• Next to "Assign access to," select "User, group, or service principal"
• Click "Select members"

• Search for your application (such as Dropzone AI Sentinel Integration) and click "Select"

• In the bottom left hand corner, click "Review + assign" twice

Workspace IDs

To obtain your Workspace Name and Workspace ID, do the following:

• Navigate to your Azure portal
• Under the "Azure Services" heading, navigate to Microsoft Sentinel

• Select the Workspace you wish to analyze

• In the left sidebar, navigate to Configuration > Settings

• Click on "Workspace Settings"

• Copy the Workspace ID, Subscription ID, and Resource Group shown for use later in the Dropzone UI

Enable Microsoft Sentinel

To enable the Alert Source integration, you will need the following information:

To enable the Alert Source integration, do the following:

• Navigate to your Dropzone AI tenant home page e.g. https://mycompany.dropzone.app
• In the bottom right corner, navigate to Settings > Integrations

• Click "Available"

• In the Search bar, search Microsoft Sentinel, then click "Configure"

• Under the Alert Source heading, input the Client ID, Tenant ID, and Client Secret

• Under the Workspaces heading, click "Add item." Input the details of your workspace, then click "Add item" again

• Under the heading "Enabled severity levels," check the boxes for each incident severity level you want Dropzone to ingest alerts for
• Under the heading "Enabled statuses," check the box for each incident status you want Dropzone to investigate alerts for

• If you wish, you may add KQL queries to investigate. To do so, click "Add Item" under the KQL Queries heading, then input the Query. Click "Add item" again when done

• If you wish, you may adjust your ticket sync settings. To do so, under the "Ticket Sync — Update Ticket Status" header, check the box labeled "Update status on investigation change"

{% hint style="info" %} Dropzone has several stages to its investigation process: Start, Completed/In Review, Reviewed, and Reopened. During those stages, Dropzone can write updates to the Sentinel ticket status. Shown below is a reasonable default. {% endhint %}

• If you want Dropzone to be able to investigate email alerts, check the box under the heading "Microsoft Defender Email Fetching"

• Input your desired log ingestion delay, poll interval and poll lookback

• If you wish for Dropzone to update the ticket status over the course of the investigation, check the box labeled "Update ticket status on investigation change," then select the status parameters

• If you wish to further filter alerts using the Python CEL package, check the box labeled "Use advanced filtering"
• Input your CEL expression, then select whether to include or exclude alerts matching that filter. Add each filter individually using the "Add Item" button
• Contact your Dropzone AI support representative for more information about this feature

• Click "Test & Save" to finish

If you have any errors engage your Dropzone AI support representative.