Detect PIM Alert Disabling activity

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Id	1f3b4dfd-21ff-4ed3-8e27-afc219e05c50
Rulename	Detect PIM Alert Disabling activity
Description	Privileged Identity Management (PIM) generates alerts when there is suspicious or unsafe activity in Microsoft Entra ID (Azure AD) organization. This query will help detect attackers attempts to disable in product PIM alerts which are associated with Azure MFA requirements and could indicate activation of privileged access
Severity	Medium
Tactics	Persistence PrivilegeEscalation
Techniques	T1098 T1078
Required data connectors	AzureActiveDirectory
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/DetectPIMAlertDisablingActivity.yaml
Version	1.0.4
Arm template	1f3b4dfd-21ff-4ed3-8e27-afc219e05c50.json

KQL

AuditLogs
| where LoggedByService =~ "PIM"
| where Category =~ "RoleManagement"
| where ActivityDisplayName has "Disable PIM Alert"
| extend IpAddress = case(
  isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)) and tostring(parse_json(tostring(InitiatedBy.user)).ipAddress) != 'null', tostring(parse_json(tostring(InitiatedBy.user)).ipAddress), 
  isnotempty(tostring(parse_json(tostring(InitiatedBy.app)).ipAddress)) and tostring(parse_json(tostring(InitiatedBy.app)).ipAddress) != 'null', tostring(parse_json(tostring(InitiatedBy.app)).ipAddress),
  'Not Available')
| extend InitiatedBy = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)), 
  tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName)), UserRoles = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
| project InitiatedBy, ActivityDateTime, ActivityDisplayName, IpAddress, AADOperationType, AADTenantId, ResourceId, CorrelationId, Identity
| extend AccountName = tostring(split(InitiatedBy, "@")[0]), AccountUPNSuffix = tostring(split(InitiatedBy, "@")[1])

YAML

severity: Medium
relevantTechniques:
- T1098
- T1078
queryFrequency: 1d
kind: Scheduled
version: 1.0.4
metadata:
  support:
    tier: Community
  categories:
    domains:
    - Security - Others
    - Identity
  author:
    name: Microsoft Security Research
  source:
    kind: Community
triggerOperator: gt
description: |
  'Privileged Identity Management (PIM) generates alerts when there is suspicious or unsafe activity in Microsoft Entra ID (Azure AD) organization. 
  This query will help detect attackers attempts to disable in product PIM alerts which are associated with Azure MFA requirements and could indicate activation of privileged access'  
queryPeriod: 1d
id: 1f3b4dfd-21ff-4ed3-8e27-afc219e05c50
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: InitiatedBy
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountUPNSuffix
    identifier: UPNSuffix
- entityType: IP
  fieldMappings:
  - columnName: IpAddress
    identifier: Address
- entityType: AzureResource
  fieldMappings:
  - columnName: ResourceId
    identifier: ResourceId
tactics:
- Persistence
- PrivilegeEscalation
name: Detect PIM Alert Disabling activity
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/DetectPIMAlertDisablingActivity.yaml
query: |
  AuditLogs
  | where LoggedByService =~ "PIM"
  | where Category =~ "RoleManagement"
  | where ActivityDisplayName has "Disable PIM Alert"
  | extend IpAddress = case(
    isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)) and tostring(parse_json(tostring(InitiatedBy.user)).ipAddress) != 'null', tostring(parse_json(tostring(InitiatedBy.user)).ipAddress), 
    isnotempty(tostring(parse_json(tostring(InitiatedBy.app)).ipAddress)) and tostring(parse_json(tostring(InitiatedBy.app)).ipAddress) != 'null', tostring(parse_json(tostring(InitiatedBy.app)).ipAddress),
    'Not Available')
  | extend InitiatedBy = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)), 
    tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName)), UserRoles = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
  | project InitiatedBy, ActivityDateTime, ActivityDisplayName, IpAddress, AADOperationType, AADTenantId, ResourceId, CorrelationId, Identity
  | extend AccountName = tostring(split(InitiatedBy, "@")[0]), AccountUPNSuffix = tostring(split(InitiatedBy, "@")[1])  
requiredDataConnectors:
- dataTypes:
  - AuditLogs
  connectorId: AzureActiveDirectory

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/1f3b4dfd-21ff-4ed3-8e27-afc219e05c50')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1f3b4dfd-21ff-4ed3-8e27-afc219e05c50')]",
      "properties": {
        "alertRuleTemplateName": "1f3b4dfd-21ff-4ed3-8e27-afc219e05c50",
        "customDetails": null,
        "description": "'Privileged Identity Management (PIM) generates alerts when there is suspicious or unsafe activity in Microsoft Entra ID (Azure AD) organization. \nThis query will help detect attackers attempts to disable in product PIM alerts which are associated with Azure MFA requirements and could indicate activation of privileged access'\n",
        "displayName": "Detect PIM Alert Disabling activity",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "InitiatedBy",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IpAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "AzureResource",
            "fieldMappings": [
              {
                "columnName": "ResourceId",
                "identifier": "ResourceId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/DetectPIMAlertDisablingActivity.yaml",
        "query": "AuditLogs\n| where LoggedByService =~ \"PIM\"\n| where Category =~ \"RoleManagement\"\n| where ActivityDisplayName has \"Disable PIM Alert\"\n| extend IpAddress = case(\n  isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)) and tostring(parse_json(tostring(InitiatedBy.user)).ipAddress) != 'null', tostring(parse_json(tostring(InitiatedBy.user)).ipAddress), \n  isnotempty(tostring(parse_json(tostring(InitiatedBy.app)).ipAddress)) and tostring(parse_json(tostring(InitiatedBy.app)).ipAddress) != 'null', tostring(parse_json(tostring(InitiatedBy.app)).ipAddress),\n  'Not Available')\n| extend InitiatedBy = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)), \n  tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName)), UserRoles = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)\n| project InitiatedBy, ActivityDateTime, ActivityDisplayName, IpAddress, AADOperationType, AADTenantId, ResourceId, CorrelationId, Identity\n| extend AccountName = tostring(split(InitiatedBy, \"@\")[0]), AccountUPNSuffix = tostring(split(InitiatedBy, \"@\")[1])\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1078",
          "T1098"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}