Azure-Sentinel/Playbooks/Remove-MDEAppExecution

Remove-MDEAppExecution

author: Nicholas DiCola

This playbook will remove restrict app execution on the machine in Microsoft Defender for Endpoint.

Quick Deployment

Deploy with incident trigger (recommended)

After deployment, attach this playbook to an automation rule so it runs when the incident is created.

Learn more about automation rules

Deploy with alert trigger

After deployment, you can run this playbook manually on an alert or attach it to an analytics rule so it will rune when an alert is created.

Prerequisites

• You will need to grant Machine.RestrictExecution permissions to the managed identity. Run the following code replacing the managed identity object id. You find the managed identity object id on the Identity blade under Settings for the Logic App.

$MIGuid = "<Enter your managed identity guid here>"
$MI = Get-AzureADServicePrincipal -ObjectId $MIGuid

$MDEAppId = "fc780465-2017-40d4-a0c5-307022471b92"
$PermissionName = "Machine.RestrictExecution" 

$MDEServicePrincipal = Get-AzureADServicePrincipal -Filter "appId eq '$MDEAppId'"
$AppRole = $MDEServicePrincipal.AppRoles | Where-Object {$_.Value -eq $PermissionName -and $_.AllowedMemberTypes -contains "Application"}
New-AzureAdServiceAppRoleAssignment -ObjectId $MI.ObjectId -PrincipalId $MI.ObjectId `
-ResourceId $MDEServicePrincipal.ObjectId -Id $AppRole.Id

Screenshots

Incident Trigger

Alert Trigger