User Assigned Privileged Role

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Id	050b9b3d-53d0-4364-a3da-1b678b8211ec
Rulename	User Assigned Privileged Role
Description	Identifies when a new privileged role is assigned to a user. Any account eligible for a role is now being given privileged access. If the assignment is unexpected or into a role that isn’t the responsibility of the account holder, investigate. Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#things-to-monitor-1
Severity	High
Tactics	Persistence
Techniques	T1078.004
Required data connectors	AzureActiveDirectory
Kind	Scheduled
Query frequency	2h
Query period	2h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/UserAssignedPrivilegedRole.yaml
Version	1.0.6
Arm template	050b9b3d-53d0-4364-a3da-1b678b8211ec.json

KQL

AuditLogs
| where Category =~ "RoleManagement"
| where AADOperationType in ("Assign", "AssignEligibleRole")
| where ActivityDisplayName has_any ("Add eligible member to role", "Add member to role")
| mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type in~ ("User", "ServicePrincipal")
      | extend Target = iff(TargetResource.type =~ "ServicePrincipal", tostring(TargetResource.displayName), tostring(TargetResource.userPrincipalName)),
               props = TargetResource.modifiedProperties
  )
| mv-apply Property = props on 
  (
      where Property.displayName =~ "Role.DisplayName"
      | extend RoleName = trim('"',tostring(Property.newValue))
  )
| where RoleName contains "Admin"
| extend InitiatingApp = tostring(InitiatedBy.app.displayName)
| extend Initiator = iif(isnotempty(InitiatingApp), InitiatingApp, tostring(InitiatedBy.user.userPrincipalName))
// Uncomment below to not alert for PIM activations
//| where Initiator != "MS-PIM"
| summarize by bin(TimeGenerated, 1h), OperationName,  RoleName, Target, Initiator, Result
| extend TargetName = tostring(split(Target,'@',0)[0]), TargetUPNSuffix = tostring(split(Target,'@',1)[0]), InitiatorName = tostring(split(Initiator,'@',0)[0]), InitiatorUPNSuffix = tostring(split(Initiator,'@',1)[0])

YAML

queryPeriod: 2h
entityMappings:
- fieldMappings:
  - columnName: TargetName
    identifier: Name
  - columnName: TargetUPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: InitiatorName
    identifier: Name
  - columnName: InitiatorUPNSuffix
    identifier: UPNSuffix
  entityType: Account
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/UserAssignedPrivilegedRole.yaml
tactics:
- Persistence
query: |
  AuditLogs
  | where Category =~ "RoleManagement"
  | where AADOperationType in ("Assign", "AssignEligibleRole")
  | where ActivityDisplayName has_any ("Add eligible member to role", "Add member to role")
  | mv-apply TargetResource = TargetResources on 
    (
        where TargetResource.type in~ ("User", "ServicePrincipal")
        | extend Target = iff(TargetResource.type =~ "ServicePrincipal", tostring(TargetResource.displayName), tostring(TargetResource.userPrincipalName)),
                 props = TargetResource.modifiedProperties
    )
  | mv-apply Property = props on 
    (
        where Property.displayName =~ "Role.DisplayName"
        | extend RoleName = trim('"',tostring(Property.newValue))
    )
  | where RoleName contains "Admin"
  | extend InitiatingApp = tostring(InitiatedBy.app.displayName)
  | extend Initiator = iif(isnotempty(InitiatingApp), InitiatingApp, tostring(InitiatedBy.user.userPrincipalName))
  // Uncomment below to not alert for PIM activations
  //| where Initiator != "MS-PIM"
  | summarize by bin(TimeGenerated, 1h), OperationName,  RoleName, Target, Initiator, Result
  | extend TargetName = tostring(split(Target,'@',0)[0]), TargetUPNSuffix = tostring(split(Target,'@',1)[0]), InitiatorName = tostring(split(Initiator,'@',0)[0]), InitiatorUPNSuffix = tostring(split(Initiator,'@',1)[0])  
description: |
  'Identifies when a new privileged role is assigned to a user.  Any account eligible for a role is now being given privileged access. If the assignment is unexpected or into a role that isn't the responsibility of the account holder, investigate.
  Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#things-to-monitor-1'  
queryFrequency: 2h
id: 050b9b3d-53d0-4364-a3da-1b678b8211ec
status: Available
tags:
- AADSecOpsGuide
relevantTechniques:
- T1078.004
severity: High
version: 1.0.6
triggerThreshold: 0
kind: Scheduled
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
name: User Assigned Privileged Role

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/050b9b3d-53d0-4364-a3da-1b678b8211ec')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/050b9b3d-53d0-4364-a3da-1b678b8211ec')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "User Assigned Privileged Role",
        "description": "'Identifies when a new privileged role is assigned to a user.  Any account eligible for a role is now being given privileged access. If the assignment is unexpected or into a role that isn't the responsibility of the account holder, investigate.\nRef : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#things-to-monitor-1'\n",
        "severity": "High",
        "enabled": true,
        "query": "AuditLogs\n| where Category =~ \"RoleManagement\"\n| where AADOperationType in (\"Assign\", \"AssignEligibleRole\")\n| where ActivityDisplayName has_any (\"Add eligible member to role\", \"Add member to role\")\n| mv-apply TargetResource = TargetResources on \n  (\n      where TargetResource.type in~ (\"User\", \"ServicePrincipal\")\n      | extend Target = iff(TargetResource.type =~ \"ServicePrincipal\", tostring(TargetResource.displayName), tostring(TargetResource.userPrincipalName)),\n               props = TargetResource.modifiedProperties\n  )\n| mv-apply Property = props on \n  (\n      where Property.displayName =~ \"Role.DisplayName\"\n      | extend RoleName = trim('\"',tostring(Property.newValue))\n  )\n| where RoleName contains \"Admin\"\n| extend InitiatingApp = tostring(InitiatedBy.app.displayName)\n| extend Initiator = iif(isnotempty(InitiatingApp), InitiatingApp, tostring(InitiatedBy.user.userPrincipalName))\n// Uncomment below to not alert for PIM activations\n//| where Initiator != \"MS-PIM\"\n| summarize by bin(TimeGenerated, 1h), OperationName,  RoleName, Target, Initiator, Result\n| extend TargetName = tostring(split(Target,'@',0)[0]), TargetUPNSuffix = tostring(split(Target,'@',1)[0]), InitiatorName = tostring(split(Initiator,'@',0)[0]), InitiatorUPNSuffix = tostring(split(Initiator,'@',1)[0])\n",
        "queryFrequency": "PT2H",
        "queryPeriod": "PT2H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "techniques": [
          "T1078.004"
        ],
        "alertRuleTemplateName": "050b9b3d-53d0-4364-a3da-1b678b8211ec",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "TargetName"
              },
              {
                "identifier": "UPNSuffix",
                "columnName": "TargetUPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "InitiatorName"
              },
              {
                "identifier": "UPNSuffix",
                "columnName": "InitiatorUPNSuffix"
              }
            ]
          }
        ],
        "tags": [
          "AADSecOpsGuide"
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/UserAssignedPrivilegedRole.yaml",
        "templateVersion": "1.0.6",
        "status": "Available"
      }
    }
  ]
}