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

entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: UPNSuffix
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: ClientIp
- entityType: CloudApplication
  fieldMappings:
  - identifier: AppId
    columnName: CloudAppId
  - identifier: InstanceName
    columnName: InstanceUrl
queryFrequency: 1h
name: Dataverse - Suspicious use of Web API
alertDetailsOverride:
  alertDisplayNameFormat: Dataverse - Suspicious Web API sign-in activity
  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.'
kind: Scheduled
tactics:
- Execution
- Exfiltration
- Reconnaissance
- Discovery
triggerThreshold: 0
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  
relevantTechniques:
- T1106
- T1567
- T1595
- T1526
- T1580
triggerOperator: gt
queryPeriod: 14d
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
severity: Medium
status: Available
id: 8a6ecba2-ccfe-4c8c-b086-fa3e6ff7fa86
requiredDataConnectors:
- connectorId: Dataverse
  dataTypes:
  - DataverseActivity
- connectorId: AzureActiveDirectory
  dataTypes:
  - SigninLogs
version: 3.2.0
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.

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"
    }
  ]
}