Dataverse - Suspicious use of Web API

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Id	8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86
Rulename	Dataverse - Suspicious use of Web API
Description	Identifies sign-in across multiple Dataverse environments, breaching a predefined threshold, originating from a user with IP address that was used to sign-into the well known Microsoft Entra app registration.
Severity	Medium
Tactics	Execution Exfiltration Reconnaissance Discovery
Techniques	T1106 T1567 T1595 T1526 T1580
Required data connectors	AzureActiveDirectory Dataverse
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Dataverse - Suspicious use of Web API.yaml
Version	3.2.0
Arm template	8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86.json

KQL

let query_frequency = 1h;
let query_lookback = 24h;
// AppID of the multi-tenant Dynamics 365 Example Client Application
let well_known_app_id = "51f81489-12ee-4a9e-aaae-a2591f45987d";
let environment_count_threshold = 10;
SigninLogs
| where TimeGenerated >= ago(query_lookback)
// Comment out the line below to monitor activity from all Azure AD apps
| where AppId == well_known_app_id
| where ResourceIdentity == '00000007-0000-0000-c000-000000000000'
| summarize FirstSeen = min(TimeGenerated) by AppId, UserPrincipalName, IPAddress, AppDisplayName
| join kind=inner (
    DataverseActivity
    | where TimeGenerated >= ago(query_frequency)
    | where Message == "UserSignIn")
    on $left.UserPrincipalName == $right.UserId, $left.IPAddress == $right.ClientIp
| where TimeGenerated between (FirstSeen .. (FirstSeen + 2h))
| summarize InstanceCount = dcount(InstanceUrl, 4), FirstSeen = min(FirstSeen) by UserId, ClientIp, InstanceUrl, AppDisplayName, AppId
| where InstanceCount > environment_count_threshold
| extend
    CloudAppId = int(32780),
    AccountName = tostring(split(UserId, '@')[0]),
    UPNSuffix = tostring(split(UserId, '@')[1])
| project
    FirstSeen,
    UserId,
    ClientIp,
    AppDisplayName,
    AppId,
    InstanceUrl,
    CloudAppId,
    AccountName,
    UPNSuffix

YAML

relevantTechniques:
- T1106
- T1567
- T1595
- T1526
- T1580
name: Dataverse - Suspicious use of Web API
queryPeriod: 14d
triggerThreshold: 0
alertDetailsOverride:
  alertDescriptionFormat: '{{UserId}} sign-in activity generated in {{InstanceUrl}}. The app used was a well known multi-tenant app not owned or registered by the organization.'
  alertDisplayNameFormat: Dataverse - Suspicious Web API sign-in activity
id: 8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86
eventGroupingSettings:
  aggregationKind: AlertPerResult
severity: Medium
requiredDataConnectors:
- dataTypes:
  - DataverseActivity
  connectorId: Dataverse
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
description: Identifies sign-in across multiple Dataverse environments, breaching a predefined threshold, originating from a user with IP address that was used to sign-into the well known Microsoft Entra app registration.
version: 3.2.0
status: Available
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountName
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
- entityType: IP
  fieldMappings:
  - columnName: ClientIp
    identifier: Address
- entityType: CloudApplication
  fieldMappings:
  - columnName: CloudAppId
    identifier: AppId
  - columnName: InstanceUrl
    identifier: InstanceName
tactics:
- Execution
- Exfiltration
- Reconnaissance
- Discovery
query: |
  let query_frequency = 1h;
  let query_lookback = 24h;
  // AppID of the multi-tenant Dynamics 365 Example Client Application
  let well_known_app_id = "51f81489-12ee-4a9e-aaae-a2591f45987d";
  let environment_count_threshold = 10;
  SigninLogs
  | where TimeGenerated >= ago(query_lookback)
  // Comment out the line below to monitor activity from all Azure AD apps
  | where AppId == well_known_app_id
  | where ResourceIdentity == '00000007-0000-0000-c000-000000000000'
  | summarize FirstSeen = min(TimeGenerated) by AppId, UserPrincipalName, IPAddress, AppDisplayName
  | join kind=inner (
      DataverseActivity
      | where TimeGenerated >= ago(query_frequency)
      | where Message == "UserSignIn")
      on $left.UserPrincipalName == $right.UserId, $left.IPAddress == $right.ClientIp
  | where TimeGenerated between (FirstSeen .. (FirstSeen + 2h))
  | summarize InstanceCount = dcount(InstanceUrl, 4), FirstSeen = min(FirstSeen) by UserId, ClientIp, InstanceUrl, AppDisplayName, AppId
  | where InstanceCount > environment_count_threshold
  | extend
      CloudAppId = int(32780),
      AccountName = tostring(split(UserId, '@')[0]),
      UPNSuffix = tostring(split(UserId, '@')[1])
  | project
      FirstSeen,
      UserId,
      ClientIp,
      AppDisplayName,
      AppId,
      InstanceUrl,
      CloudAppId,
      AccountName,
      UPNSuffix  
kind: Scheduled
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Dataverse - Suspicious use of Web API.yaml
queryFrequency: 1h

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/8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{UserId}} sign-in activity generated in {{InstanceUrl}}. The app used was a well known multi-tenant app not owned or registered by the organization.",
          "alertDisplayNameFormat": "Dataverse - Suspicious Web API sign-in activity"
        },
        "alertRuleTemplateName": "8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86",
        "customDetails": null,
        "description": "Identifies sign-in across multiple Dataverse environments, breaching a predefined threshold, originating from a user with IP address that was used to sign-into the well known Microsoft Entra app registration.",
        "displayName": "Dataverse - Suspicious use of Web API",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "ClientIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "CloudAppId",
                "identifier": "AppId"
              },
              {
                "columnName": "InstanceUrl",
                "identifier": "InstanceName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Dataverse - Suspicious use of Web API.yaml",
        "query": "let query_frequency = 1h;\nlet query_lookback = 24h;\n// AppID of the multi-tenant Dynamics 365 Example Client Application\nlet well_known_app_id = \"51f81489-12ee-4a9e-aaae-a2591f45987d\";\nlet environment_count_threshold = 10;\nSigninLogs\n| where TimeGenerated >= ago(query_lookback)\n// Comment out the line below to monitor activity from all Azure AD apps\n| where AppId == well_known_app_id\n| where ResourceIdentity == '00000007-0000-0000-c000-000000000000'\n| summarize FirstSeen = min(TimeGenerated) by AppId, UserPrincipalName, IPAddress, AppDisplayName\n| join kind=inner (\n    DataverseActivity\n    | where TimeGenerated >= ago(query_frequency)\n    | where Message == \"UserSignIn\")\n    on $left.UserPrincipalName == $right.UserId, $left.IPAddress == $right.ClientIp\n| where TimeGenerated between (FirstSeen .. (FirstSeen + 2h))\n| summarize InstanceCount = dcount(InstanceUrl, 4), FirstSeen = min(FirstSeen) by UserId, ClientIp, InstanceUrl, AppDisplayName, AppId\n| where InstanceCount > environment_count_threshold\n| extend\n    CloudAppId = int(32780),\n    AccountName = tostring(split(UserId, '@')[0]),\n    UPNSuffix = tostring(split(UserId, '@')[1])\n| project\n    FirstSeen,\n    UserId,\n    ClientIp,\n    AppDisplayName,\n    AppId,\n    InstanceUrl,\n    CloudAppId,\n    AccountName,\n    UPNSuffix\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery",
          "Execution",
          "Exfiltration",
          "Reconnaissance"
        ],
        "techniques": [
          "T1106",
          "T1526",
          "T1567",
          "T1580",
          "T1595"
        ],
        "templateVersion": "3.2.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}