Detect PIM Alert Disabling activity | Microsoft Sentinel Analytic Rules

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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

name: Detect PIM Alert Disabling activity
triggerOperator: gt
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])
queryFrequency: 1d
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'
id: 1f3b4dfd-21ff-4ed3-8e27-afc219e05c50
triggerThreshold: 0
queryPeriod: 1d
version: 1.0.4
kind: Scheduled
relevantTechniques:
- T1098
- T1078
severity: Medium
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
metadata:
  categories:
    domains:
    - Security - Others
    - Identity
  support:
    tier: Community
  author:
    name: Microsoft Security Research
  source:
    kind: Community
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/DetectPIMAlertDisablingActivity.yaml
tactics:
- Persistence
- PrivilegeEscalation
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: InitiatedBy
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: IpAddress
  entityType: IP
- fieldMappings:
  - identifier: ResourceId
    columnName: ResourceId
  entityType: AzureResource

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-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",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1078",
          "T1098"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}