PIM Elevation Request Rejected

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Id	7d7e20f8-3384-4b71-811c-f5e950e8306c
Rulename	PIM Elevation Request Rejected
Description	Identifies when a user is rejected for a privileged role elevation via PIM. Monitor rejections for indicators of attacker compromise of the requesting account. Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-identity-management
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/PIMElevationRequestRejected.yaml
Version	1.0.5
Arm template	7d7e20f8-3384-4b71-811c-f5e950e8306c.json

KQL

AuditLogs
| where ActivityDisplayName =~'Add member to role completed (PIM activation)'
| where Result =~ "failure"
| mv-apply ResourceItem = TargetResources on 
  (
      where ResourceItem.type =~ "Role"
      | extend Role = trim(@'"',tostring(ResourceItem.displayName))
  )
| mv-apply ResourceItem = TargetResources on 
  (
      where ResourceItem.type =~ "User"
      | extend User = trim(@'"',tostring(ResourceItem.userPrincipalName))
  )
| project-reorder TimeGenerated, User, Role, OperationName, Result, ResultDescription
| where isnotempty(InitiatedBy.user)
| extend InitiatingUser = tostring(InitiatedBy.user.userPrincipalName), InitiatingIpAddress = tostring(InitiatedBy.user.ipAddress)
| extend InitiatingName = tostring(split(InitiatingUser,'@',0)[0]), InitiatingUPNSuffix = tostring(split(InitiatingUser,'@',1)[0])
| extend UserName = tostring(split(User,'@',0)[0]), UserUPNSuffix = tostring(split(User,'@',1)[0])

YAML

severity: High
triggerThreshold: 0
query: |
  AuditLogs
  | where ActivityDisplayName =~'Add member to role completed (PIM activation)'
  | where Result =~ "failure"
  | mv-apply ResourceItem = TargetResources on 
    (
        where ResourceItem.type =~ "Role"
        | extend Role = trim(@'"',tostring(ResourceItem.displayName))
    )
  | mv-apply ResourceItem = TargetResources on 
    (
        where ResourceItem.type =~ "User"
        | extend User = trim(@'"',tostring(ResourceItem.userPrincipalName))
    )
  | project-reorder TimeGenerated, User, Role, OperationName, Result, ResultDescription
  | where isnotempty(InitiatedBy.user)
  | extend InitiatingUser = tostring(InitiatedBy.user.userPrincipalName), InitiatingIpAddress = tostring(InitiatedBy.user.ipAddress)
  | extend InitiatingName = tostring(split(InitiatingUser,'@',0)[0]), InitiatingUPNSuffix = tostring(split(InitiatingUser,'@',1)[0])
  | extend UserName = tostring(split(User,'@',0)[0]), UserUPNSuffix = tostring(split(User,'@',1)[0])  
queryFrequency: 2h
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
id: 7d7e20f8-3384-4b71-811c-f5e950e8306c
version: 1.0.5
name: PIM Elevation Request Rejected
kind: Scheduled
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/PIMElevationRequestRejected.yaml
queryPeriod: 2h
relevantTechniques:
- T1078.004
triggerOperator: gt
tactics:
- Persistence
tags:
- AADSecOpsGuide
description: |
  'Identifies when a user is rejected for a privileged role elevation via PIM. Monitor rejections for indicators of attacker compromise of the requesting account.
  Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-identity-management'  
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: InitiatingName
  - identifier: UPNSuffix
    columnName: InitiatingUPNSuffix
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: UserName
  - identifier: UPNSuffix
    columnName: UserUPNSuffix
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: InitiatingIpAddress

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/7d7e20f8-3384-4b71-811c-f5e950e8306c')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7d7e20f8-3384-4b71-811c-f5e950e8306c')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "PIM Elevation Request Rejected",
        "description": "'Identifies when a user is rejected for a privileged role elevation via PIM. Monitor rejections for indicators of attacker compromise of the requesting account.\nRef : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-identity-management'\n",
        "severity": "High",
        "enabled": true,
        "query": "AuditLogs\n| where ActivityDisplayName =~'Add member to role completed (PIM activation)'\n| where Result =~ \"failure\"\n| mv-apply ResourceItem = TargetResources on \n  (\n      where ResourceItem.type =~ \"Role\"\n      | extend Role = trim(@'\"',tostring(ResourceItem.displayName))\n  )\n| mv-apply ResourceItem = TargetResources on \n  (\n      where ResourceItem.type =~ \"User\"\n      | extend User = trim(@'\"',tostring(ResourceItem.userPrincipalName))\n  )\n| project-reorder TimeGenerated, User, Role, OperationName, Result, ResultDescription\n| where isnotempty(InitiatedBy.user)\n| extend InitiatingUser = tostring(InitiatedBy.user.userPrincipalName), InitiatingIpAddress = tostring(InitiatedBy.user.ipAddress)\n| extend InitiatingName = tostring(split(InitiatingUser,'@',0)[0]), InitiatingUPNSuffix = tostring(split(InitiatingUser,'@',1)[0])\n| extend UserName = tostring(split(User,'@',0)[0]), UserUPNSuffix = tostring(split(User,'@',1)[0])\n",
        "queryFrequency": "PT2H",
        "queryPeriod": "PT2H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "techniques": [
          "T1078.004"
        ],
        "alertRuleTemplateName": "7d7e20f8-3384-4b71-811c-f5e950e8306c",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "columnName": "InitiatingName",
                "identifier": "Name"
              },
              {
                "columnName": "InitiatingUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ],
            "entityType": "Account"
          },
          {
            "fieldMappings": [
              {
                "columnName": "UserName",
                "identifier": "Name"
              },
              {
                "columnName": "UserUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ],
            "entityType": "Account"
          },
          {
            "fieldMappings": [
              {
                "columnName": "InitiatingIpAddress",
                "identifier": "Address"
              }
            ],
            "entityType": "IP"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/PIMElevationRequestRejected.yaml",
        "tags": [
          "AADSecOpsGuide"
        ],
        "templateVersion": "1.0.5",
        "status": "Available"
      }
    }
  ]
}