Defender-For-Cloud-Apps Toolbox : Powering Up Microsoft Cloud App Security With PowerShell

The Defender-for-Cloud-Apps Toolbox is a robust collection of PowerShell functions designed to streamline and automate the management of Microsoft Cloud App Security (MCAS).

By leveraging these tools, administrators can efficiently handle tasks such as managing blocklists, configuring IP ranges, and more. Below is a detailed overview of its features, functions, requirements, and usage.

Features

The toolbox offers the following key functionalities:

• Export MCAS Blocklist: Export and manage blocklists from MCAS.
• Export MCAS IP Ranges: Extract all IP ranges in a structured CSV format.
• Get MCAS IP Ranges: Retrieve and list all existing IP ranges configured in MCAS.
• Create New MCAS IP Ranges: Add new IP ranges with specified metadata.
• Update Existing MCAS IP Ranges: Modify existing IP range details.
• Remove MCAS IP Ranges: Delete specific IP ranges from MCAS.

Functions

1. Export-MCASBlockList.ps1: Exports the current blocklist for review or archival purposes.
2. Export-MCASIpRange.ps1: Outputs all configured IP ranges into a CSV file with metadata like names, categories, and tags.
3. Get-MCASIPRanges.ps1: Lists all configured IP ranges with details such as subnets and tags.
4. New-MCASIpRange.ps1: Adds new IP ranges to the configuration using specified parameters.
5. Remove-MCASIPRange.ps1: Deletes specified IP ranges from the setup.
6. Update-MCASIPRange.ps1: Updates metadata for existing IP ranges.

To use the toolbox:

• PowerShell 5.1 (Windows) or 7.x (cross-platform) is required.
• An Entra ID App Registration with API permissions for Discovery.manage, Settings.read, and Settings.manage.
• Network access to the MCAS API endpoint.

To install, clone the repository:

git clone https://github.com/alexverboon/Defender-for-Cloud-Apps-Toolbox.git

Import the desired functions into your PowerShell session:

Import-Module .\FunctionName.ps1

Export All IP Ranges

.\Export-MCASIpRange.ps1 -McasPortalAPI "https://yourmcasapi.com" -Token "your_token" -OutputCsvFilePath "c:\Sampledata\mcas_export.csv"

Add a New IP Range

New-MCASIpRange -CsvFilePath "c:\sampledata\mcasip_new.csv" -McasPortalAPI "https://yourmcasapi.com" -Token $token

Remove an IP Range

Remove-MCASIPRange -CsvFilePath "C:\sampledata\mcasip_remove.csv" -McasPortalAPI "https://yourmcasapi.com" -Token $token

This toolbox simplifies administrative tasks in Microsoft Defender for Cloud Apps, enabling efficient management of security configurations through automation.