Azure Sentinel is a powerful, cloud-native Security Information and Event Management (SIEM) solution that provides intelligent security analytics for your entire enterprise. As a Systems Engineer specializing in Windows, you might find yourself needing to manage Azure Sentinel incidents programmatically. This guide will walk you through the use of the New-AzSentinelIncident cmdlet in PowerShell, providing practical examples and detailed explanations.

Introduction to Azure Sentinel and PowerShell

Azure Sentinel helps you detect, investigate, and respond to threats across your enterprise. PowerShell, a task automation and configuration management framework from Microsoft, can be used to automate the management of Azure Sentinel incidents. The New-AzSentinelIncident cmdlet is part of the Az.SecurityInsights module, which allows you to create and manage incidents in Azure Sentinel.

Prerequisites

Before you begin, ensure you have the following prerequisites:

1. Azure Subscription: You need an active Azure subscription.
2. Azure Sentinel Workspace: Ensure you have an Azure Sentinel workspace set up.
3. PowerShell: Install the latest version of PowerShell.
4. Az.SecurityInsights Module: Install the Az.SecurityInsights module using the command:

   Install-Module -Name Az.SecurityInsights -AllowClobber -Force

Connecting to Your Azure Account

First, you need to connect to your Azure account. Use the Connect-AzAccount cmdlet to authenticate:

Connect-AzAccount

Creating an Azure Sentinel Incident

To create a new incident in Azure Sentinel, use the New-AzSentinelIncident cmdlet. Here is a practical example:

# Variables
$ResourceGroupName = "YourResourceGroupName"
$WorkspaceName = "YourWorkspaceName"
$IncidentTitle = "Suspicious Activity Detected"
$IncidentDescription = "Suspicious login attempts detected from multiple IP addresses."
$Severity = "High"
$Status = "New"
$Owner = "admin@yourdomain.com"

# Create Incident
New-AzSentinelIncident -ResourceGroupName $ResourceGroupName `
                       -WorkspaceName $WorkspaceName `
                       -Title $IncidentTitle `
                       -Description $IncidentDescription `
                       -Severity $Severity `
                       -Status $Status `
                       -Owner $Owner

Listing Azure Sentinel Incidents

To list all incidents in your Azure Sentinel workspace, use the Get-AzSentinelIncident cmdlet:

# Variables
$ResourceGroupName = "YourResourceGroupName"
$WorkspaceName = "YourWorkspaceName"

# Get Incidents
Get-AzSentinelIncident -ResourceGroupName $ResourceGroupName -WorkspaceName $WorkspaceName

Updating an Azure Sentinel Incident

To update an existing incident, use the Set-AzSentinelIncident cmdlet. Here is an example:

# Variables
$ResourceGroupName = "YourResourceGroupName"
$WorkspaceName = "YourWorkspaceName"
$IncidentId = "IncidentIdToUpdate"
$NewStatus = "Closed"

# Update Incident
Set-AzSentinelIncident -ResourceGroupName $ResourceGroupName `
                       -WorkspaceName $WorkspaceName `
                       -IncidentId $IncidentId `
                       -Status $NewStatus

Deleting an Azure Sentinel Incident

To delete an incident, use the Remove-AzSentinelIncident cmdlet:

# Variables
$ResourceGroupName = "YourResourceGroupName"
$WorkspaceName = "YourWorkspaceName"
$IncidentId = "IncidentIdToDelete"

# Remove Incident
Remove-AzSentinelIncident -ResourceGroupName $ResourceGroupName `
                          -WorkspaceName $WorkspaceName `
                          -IncidentId $IncidentId

Conclusion

Using PowerShell to manage Azure Sentinel incidents can significantly streamline your security operations. The New-AzSentinelIncident cmdlet, along with other related cmdlets, provides a powerful way to automate incident management tasks. By integrating these cmdlets into your workflows, you can enhance your organization's ability to respond to security threats efficiently.