{
  "$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/95dc4ae3-e0f2-48bd-b996-cdd22b90f9af')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/95dc4ae3-e0f2-48bd-b996-cdd22b90f9af')]",
      "properties": {
        "alertRuleTemplateName": "95dc4ae3-e0f2-48bd-b996-cdd22b90f9af",
        "customDetails": null,
        "description": "'This will alert when a user or application modifies the federation settings on the domain or Update domain authentication from Managed to Federated.\nFor example, this alert will trigger when a new Active Directory Federated Service (ADFS) TrustedRealm object, such as a signing certificate, is added to the domain.\nModification to domain federation settings should be rare. Confirm the added or modified target domain/URL is legitimate administrator behavior.\nTo understand why an authorized user may update settings for a federated domain in Office 365, Azure, or Intune, see: https://docs.microsoft.com/office365/troubleshoot/active-directory/update-federated-domain-office-365.\nFor details on security realms that accept security tokens, see the ADFS Proxy Protocol (MS-ADFSPP) specification: https://docs.microsoft.com/openspecs/windows_protocols/ms-adfspp/e7b9ea73-1980-4318-96a6-da559486664b.\nFor further information on AuditLogs please see https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-audit-activities.'\n",
        "displayName": "Modified domain federation trust settings",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "InitiatingAppName",
                "identifier": "Name"
              },
              {
                "columnName": "InitiatingAppServicePrincipalId",
                "identifier": "AadUserId"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "InitiatingUserPrincipalName",
                "identifier": "FullName"
              },
              {
                "columnName": "InitiatingAccountName",
                "identifier": "Name"
              },
              {
                "columnName": "InitiatingAccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "InitiatingAadUserId",
                "identifier": "AadUserId"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "InitiatingIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Entra%20ID/Analytic%20Rules/ADFSDomainTrustMods.yaml",
        "query": "(union isfuzzy=true\n(\nAuditLogs\n| where OperationName =~ \"Set federation settings on domain\"\n//| where Result =~ \"success\"   // commenting out, as it may be interesting to capture failed attempts\n| mv-expand TargetResources\n| extend modifiedProperties = parse_json(TargetResources).modifiedProperties\n| mv-expand modifiedProperties\n| extend targetDisplayName = tostring(parse_json(modifiedProperties).displayName)\n),\n(\nAuditLogs\n| where OperationName =~ \"Set domain authentication\"\n//| where Result =~ \"success\"   // commenting out, as it may be interesting to capture failed attempts\n| mv-expand TargetResources\n| extend modifiedProperties = parse_json(TargetResources).modifiedProperties\n| mv-expand modifiedProperties\n| mv-apply Property = modifiedProperties on\n  (\n      where Property.displayName =~ \"LiveType\"\n      | extend targetDisplayName = tostring(Property.displayName),\n               NewDomainValue = tostring(Property.newValue)\n  )\n| where NewDomainValue has \"Federated\"\n)\n)\n| mv-apply AdditionalDetail = AdditionalDetails on\n  (\n      where AdditionalDetail.key =~ \"User-Agent\"\n      | extend UserAgent = tostring(AdditionalDetail.value)\n  )\n| extend InitiatingUserOrApp = iff(isnotempty(InitiatedBy.user.userPrincipalName),tostring(InitiatedBy.user.userPrincipalName), tostring(InitiatedBy.app.displayName))\n| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)\n| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)\n| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)\n| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)\n| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))\n| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, \"@\")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, \"@\")[1])\n| project-reorder TimeGenerated, OperationName, InitiatingUserOrApp, AADOperationType, targetDisplayName, Result, InitiatingIpAddress, UserAgent, CorrelationId, TenantId, AADTenantId\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "Persistence",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1098",
          "T1555"
        ],
        "templateVersion": "1.1.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}