Netskope (using Azure Functions) connector for Microsoft Sentinel

Articol
04/28/2024

The Netskope Cloud Security Platform connector provides the capability to ingest Netskope logs and events into Microsoft Sentinel. The connector provides visibility into Netskope Platform Events and Alerts in Microsoft Sentinel to improve monitoring and investigation capabilities.

This is autogenerated content. For changes, contact the solution provider.

Connector attributes

Connector attribute	Description
Application settings	apikey workspaceID workspaceKey uri timeInterval logTypes logAnalyticsUri (optional)
Azure function app code	https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Solutions/Netskope/Data%20Connectors/Netskope/AzureFunctionNetskope/run.ps1
Log Analytics table(s)	Netskope_CL
Data collection rules support	Not currently supported
Supported by	Netskope

Query samples

Top 10 Users

Netskope

| summarize count() by SrcUserName 

| top 10 by count_

Top 10 Alerts

Netskope

| where isnotempty(AlertName) 

| summarize count() by AlertName 

| top 10 by count_

Prerequisites

To integrate with Netskope (using Azure Functions) make sure you have:

Microsoft.Web/sites permissions: Read and write permissions to Azure Functions to create a Function App is required. See the documentation to learn more about Azure Functions.
Netskope API Token: A Netskope API Token is required. See the documentation to learn more about Netskope API. Note: A Netskope account is required

Vendor installation instructions

Note

This connector uses Azure Functions to connect to Netskope to pull logs into Microsoft Sentinel. This might result in additional data ingestion costs. Check the Azure Functions pricing page for details.

Note

This data connector depends on a parser based on a Kusto Function to work as expected which is deployed as part of the solution. To view the function code in Log Analytics, open Log Analytics/Microsoft Sentinel Logs blade, click Functions and search for the alias Netskope and load the function code or click here, on the second line of the query, enter the hostname(s) of your Netskope device(s) and any other unique identifiers for the logstream. The function usually takes 10-15 minutes to activate after solution installation/update.

(Optional Step) Securely store workspace and API authorization key(s) or token(s) in Azure Key Vault. Azure Key Vault provides a secure mechanism to store and retrieve key values. Follow these instructions to use Azure Key Vault with an Azure Function App.

STEP 1 - Configuration steps for the Netskope API

Follow these instructions provided by Netskope to obtain an API Token. Note: A Netskope account is required

STEP 2 - Choose ONE from the following two deployment options to deploy the connector and the associated Azure Function

IMPORTANT: Before deploying the Netskope connector, have the Workspace ID and Workspace Primary Key (can be copied from the following), as well as the Netskope API Authorization Token, readily available.

Option 1 - Azure Resource Manager (ARM) Template

This method provides an automated deployment of the Netskope connector using an ARM Tempate.

Click the Deploy to Azure button below.
Select the preferred Subscription, Resource Group and Location.
Enter the Workspace ID, Workspace Key, API Key, and URI.

Use the following schema for the uri value: https://<Tenant Name>.goskope.com Replace <Tenant Name> with your domain.
The default Time Interval is set to pull the last five (5) minutes of data. If the time interval needs to be modified, it is recommended to change the Function App Timer Trigger accordingly (in the function.json file, post deployment) to prevent overlapping data ingestion.
The default Log Types is set to pull all 6 available log types (alert, page, application, audit, infrastructure, network), remove any are not required.
Note: If using Azure Key Vault secrets for any of the values above, use the@Microsoft.KeyVault(SecretUri={Security Identifier})schema in place of the string values. Refer to Key Vault references documentation for further details.

Mark the checkbox labeled I agree to the terms and conditions stated above.
Click Purchase to deploy.
After successfully deploying the connector, download the Kusto Function to normalize the data fields. Follow the steps to use the Kusto function alias, Netskope.

Option 2 - Manual Deployment of Azure Functions

This method provides the step-by-step instructions to deploy the Netskope connector manually with Azure Function.

1. Create a Function App

From the Azure Portal, navigate to Function App, and select + Add.
In the Basics tab, ensure Runtime stack is set to Powershell Core.
In the Hosting tab, ensure the Consumption (Serverless) plan type is selected.
Make other preferrable configuration changes, if needed, then click Create.

2. Import Function App Code

In the newly created Function App, select Functions on the left pane and click + Add.
Select Timer Trigger.
Enter a unique Function Name and modify the cron schedule, if needed. The default value is set to run the Function App every 5 minutes. (Note: the Timer trigger should match the timeInterval value below to prevent overlapping data), click Create.
Click on Code + Test on the left pane.
Copy the Function App Code and paste into the Function App run.ps1 editor.
Click Save.

3. Configure the Function App

In the Function App, select the Function App Name and select Configuration.
In the Application settings tab, select + New application setting.
Add each of the following seven (7) application settings individually, with their respective string values (case-sensitive): apikey workspaceID workspaceKey uri timeInterval logTypes logAnalyticsUri (optional)

Enter the URI that corresponds to your region. The uri value must follow the following schema: https://<Tenant Name>.goskope.com - There is no need to add subsquent parameters to the Uri, the Function App will dynamically append the parameteres in the proper format.

Set the timeInterval (in minutes) to the default value of 5 to correspond to the default Timer Trigger of every 5 minutes. If the time interval needs to be modified, it is recommended to change the Function App Timer Trigger accordingly to prevent overlapping data ingestion.

Set the logTypes to alert, page, application, audit, infrastructure, network - This list represents all the avaliable log types. Select the log types based on logging requirements, seperating each by a single comma.

Note: If using Azure Key Vault, use the@Microsoft.KeyVault(SecretUri={Security Identifier})schema in place of the string values. Refer to Key Vault references documentation for further details.

Use logAnalyticsUri to override the log analytics API endpoint for dedicated cloud. For example, for public cloud, leave the value empty; for Azure GovUS cloud environment, specify the value in the following format: https://<CustomerId>.ods.opinsights.azure.us. 4. Once all application settings have been entered, click Save. 5. After successfully deploying the connector, download the Kusto Function to normalize the data fields. Follow the steps to use the Kusto function alias, Netskope.

Next steps

For more information, go to the related solution in the Azure Marketplace.

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