BTP - Cloud Identity Service application configuration monitor

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Id	3f8a2c5e-7b9d-4e1a-8f6c-2d4b9a1e3c7f
Rulename	BTP - Cloud Identity Service application configuration monitor
Description	Identifies CRUD operations on Application (SSO Domain/Service Provider) configurations within SAP Cloud Identity Service. This includes both SAML 2.0 and OpenID Connect applications. Unauthorized application creation could indicate an attacker establishing persistent access through a rogue federated application.
Severity	Medium
Tactics	CredentialAccess PrivilegeEscalation
Techniques	T1606 T1556 T1134
Required data connectors	SAPBTPAuditEvents
Kind	Scheduled
Query frequency	15m
Query period	15m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SAP%20BTP/Analytic%20Rules/BTP%20-%20Cloud%20Identity%20Service%20application%20configuration%20monitor.yaml
Version	1.0.0
Arm template	3f8a2c5e-7b9d-4e1a-8f6c-2d4b9a1e3c7f.json

KQL

SAPBTPAuditLog_CL
| extend data_s = tostring(Message.data)
| extend 
    action = extract(@"action=""([^""]+)""", 1, data_s),
    state = extract(@"state=""([^""]+)""", 1, data_s),
    objectType = extract(@"objectType=""([^""]+)""", 1, data_s),
    serviceProviderName = extract(@"serviceProviderName=""([^""]+)""", 1, data_s),
    ipAddress = extract(@"ipAddress=""([^""]+)""", 1, data_s),
    // Extract payload JSON for federation type
    payloadJson = extract(@"\{""payload"":\{([^}]+)\}\}", 1, data_s)
| extend federationType = extract(@"""type"":""([^""]+)""", 1, payloadJson)
| where objectType == "ssoDomain"
| where state == "successful"
| where action in ("create", "update", "delete")
| extend MessageText = case(
    action == "create", strcat("Application '", serviceProviderName, "' (", federationType, ") was created"),
    action == "update", strcat("Application '", serviceProviderName, "' (", federationType, ") was updated"),
    action == "delete", strcat("Application '", serviceProviderName, "' was deleted"),
    "Unclassified operation on application"
)
| project
    UpdatedOn,
    UserName,
    MessageText,
    ServiceProviderName = serviceProviderName,
    FederationType = federationType,
    Action = action,
    Tenant,
    ipAddress,
    CloudApp = "SAP Cloud Identity Service"
| extend AccountName = split(UserName, "@")[0], UPNSuffix = split(UserName, "@")[1]

YAML

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SAP%20BTP/Analytic%20Rules/BTP%20-%20Cloud%20Identity%20Service%20application%20configuration%20monitor.yaml
version: 1.0.0
status: Available
requiredDataConnectors:
- dataTypes:
  - SAPBTPAuditLog_CL
  connectorId: SAPBTPAuditEvents
alertDetailsOverride:
  alertDescriptionFormat: "{{MessageText}} by {{UserName}}. Identity provider name: {{ServiceProviderName}}\n    \nThis could indicate:\n- Legitimate administrative change to federated applications\n- Unauthorized application registration for persistent access\n- Rogue SAML/OIDC application added by attacker\n"
  alertDisplayNameFormat: 'SAP Cloud Identity Service: {{MessageText}}'
relevantTechniques:
- T1606
- T1556
- T1134
customDetails:
  FederationType: FederationType
  Action: Action
  SourceIP: ipAddress
  ServiceProviderName: ServiceProviderName
query: |
  SAPBTPAuditLog_CL
  | extend data_s = tostring(Message.data)
  | extend 
      action = extract(@"action=""([^""]+)""", 1, data_s),
      state = extract(@"state=""([^""]+)""", 1, data_s),
      objectType = extract(@"objectType=""([^""]+)""", 1, data_s),
      serviceProviderName = extract(@"serviceProviderName=""([^""]+)""", 1, data_s),
      ipAddress = extract(@"ipAddress=""([^""]+)""", 1, data_s),
      // Extract payload JSON for federation type
      payloadJson = extract(@"\{""payload"":\{([^}]+)\}\}", 1, data_s)
  | extend federationType = extract(@"""type"":""([^""]+)""", 1, payloadJson)
  | where objectType == "ssoDomain"
  | where state == "successful"
  | where action in ("create", "update", "delete")
  | extend MessageText = case(
      action == "create", strcat("Application '", serviceProviderName, "' (", federationType, ") was created"),
      action == "update", strcat("Application '", serviceProviderName, "' (", federationType, ") was updated"),
      action == "delete", strcat("Application '", serviceProviderName, "' was deleted"),
      "Unclassified operation on application"
  )
  | project
      UpdatedOn,
      UserName,
      MessageText,
      ServiceProviderName = serviceProviderName,
      FederationType = federationType,
      Action = action,
      Tenant,
      ipAddress,
      CloudApp = "SAP Cloud Identity Service"
  | extend AccountName = split(UserName, "@")[0], UPNSuffix = split(UserName, "@")[1]
tactics:
- CredentialAccess
- PrivilegeEscalation
queryFrequency: 15m
id: 3f8a2c5e-7b9d-4e1a-8f6c-2d4b9a1e3c7f
triggerThreshold: 0
triggerOperator: gt
name: BTP - Cloud Identity Service application configuration monitor
queryPeriod: 15m
severity: Medium
entityMappings:
- fieldMappings:
  - columnName: AccountName
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: ipAddress
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: CloudApp
    identifier: Name
  entityType: CloudApplication
eventGroupingSettings:
  aggregationKind: SingleAlert
description: |
  Identifies CRUD operations on Application (SSO Domain/Service Provider) configurations
  within SAP Cloud Identity Service. This includes both SAML 2.0 and OpenID Connect applications.
  Unauthorized application creation could indicate an attacker establishing persistent access
  through a rogue federated application.

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/3f8a2c5e-7b9d-4e1a-8f6c-2d4b9a1e3c7f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3f8a2c5e-7b9d-4e1a-8f6c-2d4b9a1e3c7f')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{MessageText}} by {{UserName}}. Identity provider name: {{ServiceProviderName}}\n    \nThis could indicate:\n- Legitimate administrative change to federated applications\n- Unauthorized application registration for persistent access\n- Rogue SAML/OIDC application added by attacker\n",
          "alertDisplayNameFormat": "SAP Cloud Identity Service: {{MessageText}}"
        },
        "alertRuleTemplateName": "3f8a2c5e-7b9d-4e1a-8f6c-2d4b9a1e3c7f",
        "customDetails": {
          "Action": "Action",
          "FederationType": "FederationType",
          "ServiceProviderName": "ServiceProviderName",
          "SourceIP": "ipAddress"
        },
        "description": "Identifies CRUD operations on Application (SSO Domain/Service Provider) configurations\nwithin SAP Cloud Identity Service. This includes both SAML 2.0 and OpenID Connect applications.\nUnauthorized application creation could indicate an attacker establishing persistent access\nthrough a rogue federated application.\n",
        "displayName": "BTP - Cloud Identity Service application configuration monitor",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "ipAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "CloudApp",
                "identifier": "Name"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SAP%20BTP/Analytic%20Rules/BTP%20-%20Cloud%20Identity%20Service%20application%20configuration%20monitor.yaml",
        "query": "SAPBTPAuditLog_CL\n| extend data_s = tostring(Message.data)\n| extend \n    action = extract(@\"action=\"\"([^\"\"]+)\"\"\", 1, data_s),\n    state = extract(@\"state=\"\"([^\"\"]+)\"\"\", 1, data_s),\n    objectType = extract(@\"objectType=\"\"([^\"\"]+)\"\"\", 1, data_s),\n    serviceProviderName = extract(@\"serviceProviderName=\"\"([^\"\"]+)\"\"\", 1, data_s),\n    ipAddress = extract(@\"ipAddress=\"\"([^\"\"]+)\"\"\", 1, data_s),\n    // Extract payload JSON for federation type\n    payloadJson = extract(@\"\\{\"\"payload\"\":\\{([^}]+)\\}\\}\", 1, data_s)\n| extend federationType = extract(@\"\"\"type\"\":\"\"([^\"\"]+)\"\"\", 1, payloadJson)\n| where objectType == \"ssoDomain\"\n| where state == \"successful\"\n| where action in (\"create\", \"update\", \"delete\")\n| extend MessageText = case(\n    action == \"create\", strcat(\"Application '\", serviceProviderName, \"' (\", federationType, \") was created\"),\n    action == \"update\", strcat(\"Application '\", serviceProviderName, \"' (\", federationType, \") was updated\"),\n    action == \"delete\", strcat(\"Application '\", serviceProviderName, \"' was deleted\"),\n    \"Unclassified operation on application\"\n)\n| project\n    UpdatedOn,\n    UserName,\n    MessageText,\n    ServiceProviderName = serviceProviderName,\n    FederationType = federationType,\n    Action = action,\n    Tenant,\n    ipAddress,\n    CloudApp = \"SAP Cloud Identity Service\"\n| extend AccountName = split(UserName, \"@\")[0], UPNSuffix = split(UserName, \"@\")[1]\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT15M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1134",
          "T1556",
          "T1606"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}