Dataverse - Suspicious use of TDS endpoint | Microsoft Sentinel Analytic Rules

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Id	d875af10-6bb9-4d6a-a6e4-78439a98bf4b
Rulename	Dataverse - Suspicious use of TDS endpoint
Description	Identifies Dataverse TDS (Tabular Data Stream) protocol based queries where the source user or IP address has recent security alerts and the TDS protocol has not been used previously in the target environment.
Severity	Low
Tactics	Exfiltration InitialAccess
Techniques	T1048 T1190
Required data connectors	AzureActiveDirectoryIdentityProtection 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%20Business%20Applications/Analytic%20Rules/Dataverse%20-%20Suspicious%20use%20of%20TDS%20endpoint.yaml
Version	3.2.0
Arm template	d875af10-6bb9-4d6a-a6e4-78439a98bf4b.json

KQL

let query_frequency = 1h;
let query_lookback = 14d;
DataverseActivity
| where TimeGenerated >= ago(query_frequency)
| where Message == 'ExecutePowerBISql'
| summarize FirstEvent = min(TimeGenerated) by UserId, ClientIp, InstanceUrl
| join kind=inner(
    DataverseActivity
    | where TimeGenerated >= ago(query_lookback)
    | where Message == 'ExecutePowerBISql'
    | summarize UniqueUsers = dcount(UserId, 4) by InstanceUrl)
    on InstanceUrl
| where UniqueUsers == 1
| join kind=inner (
    SecurityAlert
    | where Entities has ('"Type":"ip"')
    | project AlertName, SystemAlertId, Entities
    | mv-expand todynamic(Entities)
    | where Entities.Type == "ip"
    | extend IPAddress = tostring(Entities.Address)
    | summarize SystemAlerts = make_set(SystemAlertId, 100), Alerts = make_set(AlertName, 100) by IPAddress)
    on $left.ClientIp == $right.IPAddress
| extend
    CloudAppId = int(32780),
    AccountName = tostring(split(UserId, '@')[0]),
    UPNSuffix = tostring(split(UserId, '@')[1])
| join kind = inner (
    SecurityAlert
    | where Entities has ('Type":"account"')
    | project AlertName, SystemAlertId, Entities
    | mv-expand todynamic(Entities)
    | where Entities.Type == "account"
    | extend
        UPNSuffix = tostring(Entities.UPNSuffix),
        AccountName = tostring(Entities.Name)
    | summarize SystemAlerts = make_set(SystemAlertId, 100), Alerts = make_set(AlertName, 100) by AccountName, UPNSuffix
    | where isnotempty(AccountName) and isnotempty(UPNSuffix))
    on AccountName, UPNSuffix
| summarize SystemAlerts = make_set(SystemAlerts, 100), Alerts = make_set(Alerts, 100) by FirstEvent, UserId, ClientIp, InstanceUrl, AccountName, UPNSuffix
| extend CloudAppId = int(32780)
| project
    FirstEvent,
    UserId,
    ClientIp,
    InstanceUrl,
    Alerts,
    SystemAlerts,
    CloudAppId,
    AccountName,
    UPNSuffix

YAML

query: |
  let query_frequency = 1h;
  let query_lookback = 14d;
  DataverseActivity
  | where TimeGenerated >= ago(query_frequency)
  | where Message == 'ExecutePowerBISql'
  | summarize FirstEvent = min(TimeGenerated) by UserId, ClientIp, InstanceUrl
  | join kind=inner(
      DataverseActivity
      | where TimeGenerated >= ago(query_lookback)
      | where Message == 'ExecutePowerBISql'
      | summarize UniqueUsers = dcount(UserId, 4) by InstanceUrl)
      on InstanceUrl
  | where UniqueUsers == 1
  | join kind=inner (
      SecurityAlert
      | where Entities has ('"Type":"ip"')
      | project AlertName, SystemAlertId, Entities
      | mv-expand todynamic(Entities)
      | where Entities.Type == "ip"
      | extend IPAddress = tostring(Entities.Address)
      | summarize SystemAlerts = make_set(SystemAlertId, 100), Alerts = make_set(AlertName, 100) by IPAddress)
      on $left.ClientIp == $right.IPAddress
  | extend
      CloudAppId = int(32780),
      AccountName = tostring(split(UserId, '@')[0]),
      UPNSuffix = tostring(split(UserId, '@')[1])
  | join kind = inner (
      SecurityAlert
      | where Entities has ('Type":"account"')
      | project AlertName, SystemAlertId, Entities
      | mv-expand todynamic(Entities)
      | where Entities.Type == "account"
      | extend
          UPNSuffix = tostring(Entities.UPNSuffix),
          AccountName = tostring(Entities.Name)
      | summarize SystemAlerts = make_set(SystemAlertId, 100), Alerts = make_set(AlertName, 100) by AccountName, UPNSuffix
      | where isnotempty(AccountName) and isnotempty(UPNSuffix))
      on AccountName, UPNSuffix
  | summarize SystemAlerts = make_set(SystemAlerts, 100), Alerts = make_set(Alerts, 100) by FirstEvent, UserId, ClientIp, InstanceUrl, AccountName, UPNSuffix
  | extend CloudAppId = int(32780)
  | project
      FirstEvent,
      UserId,
      ClientIp,
      InstanceUrl,
      Alerts,
      SystemAlerts,
      CloudAppId,
      AccountName,
      UPNSuffix
status: Available
id: d875af10-6bb9-4d6a-a6e4-78439a98bf4b
tactics:
- Exfiltration
- InitialAccess
version: 3.2.0
triggerOperator: gt
entityMappings:
- fieldMappings:
  - columnName: AccountName
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: CloudAppId
    identifier: AppId
  - columnName: InstanceUrl
    identifier: InstanceName
  entityType: CloudApplication
- fieldMappings:
  - columnName: ClientIp
    identifier: Address
  entityType: IP
alertDetailsOverride:
  alertDisplayNameFormat: 'Dataverse - Suspicious use of TDS endpoint in {{InstanceUrl}} '
  alertDescriptionFormat: 'The TDS endpoint was used to query Dataverse instance {{InstanceUrl}} . The use of this protocol was not seen previously and the following alerts were associated with the caller: {{Alerts}}'
severity: Low
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Business%20Applications/Analytic%20Rules/Dataverse%20-%20Suspicious%20use%20of%20TDS%20endpoint.yaml
kind: Scheduled
requiredDataConnectors:
- connectorId: Dataverse
  dataTypes:
  - DataverseActivity
- connectorId: AzureActiveDirectoryIdentityProtection
  dataTypes:
  - SecurityAlert
queryFrequency: 1h
triggerThreshold: 0
queryPeriod: 14d
description: Identifies Dataverse TDS (Tabular Data Stream) protocol based queries where the source user or IP address has recent security alerts and the TDS protocol has not been used previously in the target environment.
name: Dataverse - Suspicious use of TDS endpoint
relevantTechniques:
- T1048
- T1190
eventGroupingSettings:
  aggregationKind: AlertPerResult

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/d875af10-6bb9-4d6a-a6e4-78439a98bf4b')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d875af10-6bb9-4d6a-a6e4-78439a98bf4b')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "The TDS endpoint was used to query Dataverse instance {{InstanceUrl}} . The use of this protocol was not seen previously and the following alerts were associated with the caller: {{Alerts}}",
          "alertDisplayNameFormat": "Dataverse - Suspicious use of TDS endpoint in {{InstanceUrl}} "
        },
        "alertRuleTemplateName": "d875af10-6bb9-4d6a-a6e4-78439a98bf4b",
        "customDetails": null,
        "description": "Identifies Dataverse TDS (Tabular Data Stream) protocol based queries where the source user or IP address has recent security alerts and the TDS protocol has not been used previously in the target environment.",
        "displayName": "Dataverse - Suspicious use of TDS endpoint",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "CloudAppId",
                "identifier": "AppId"
              },
              {
                "columnName": "InstanceUrl",
                "identifier": "InstanceName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "ClientIp",
                "identifier": "Address"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Business%20Applications/Analytic%20Rules/Dataverse%20-%20Suspicious%20use%20of%20TDS%20endpoint.yaml",
        "query": "let query_frequency = 1h;\nlet query_lookback = 14d;\nDataverseActivity\n| where TimeGenerated >= ago(query_frequency)\n| where Message == 'ExecutePowerBISql'\n| summarize FirstEvent = min(TimeGenerated) by UserId, ClientIp, InstanceUrl\n| join kind=inner(\n    DataverseActivity\n    | where TimeGenerated >= ago(query_lookback)\n    | where Message == 'ExecutePowerBISql'\n    | summarize UniqueUsers = dcount(UserId, 4) by InstanceUrl)\n    on InstanceUrl\n| where UniqueUsers == 1\n| join kind=inner (\n    SecurityAlert\n    | where Entities has ('\"Type\":\"ip\"')\n    | project AlertName, SystemAlertId, Entities\n    | mv-expand todynamic(Entities)\n    | where Entities.Type == \"ip\"\n    | extend IPAddress = tostring(Entities.Address)\n    | summarize SystemAlerts = make_set(SystemAlertId, 100), Alerts = make_set(AlertName, 100) by IPAddress)\n    on $left.ClientIp == $right.IPAddress\n| extend\n    CloudAppId = int(32780),\n    AccountName = tostring(split(UserId, '@')[0]),\n    UPNSuffix = tostring(split(UserId, '@')[1])\n| join kind = inner (\n    SecurityAlert\n    | where Entities has ('Type\":\"account\"')\n    | project AlertName, SystemAlertId, Entities\n    | mv-expand todynamic(Entities)\n    | where Entities.Type == \"account\"\n    | extend\n        UPNSuffix = tostring(Entities.UPNSuffix),\n        AccountName = tostring(Entities.Name)\n    | summarize SystemAlerts = make_set(SystemAlertId, 100), Alerts = make_set(AlertName, 100) by AccountName, UPNSuffix\n    | where isnotempty(AccountName) and isnotempty(UPNSuffix))\n    on AccountName, UPNSuffix\n| summarize SystemAlerts = make_set(SystemAlerts, 100), Alerts = make_set(Alerts, 100) by FirstEvent, UserId, ClientIp, InstanceUrl, AccountName, UPNSuffix\n| extend CloudAppId = int(32780)\n| project\n    FirstEvent,\n    UserId,\n    ClientIp,\n    InstanceUrl,\n    Alerts,\n    SystemAlerts,\n    CloudAppId,\n    AccountName,\n    UPNSuffix\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Low",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration",
          "InitialAccess"
        ],
        "techniques": [
          "T1048",
          "T1190"
        ],
        "templateVersion": "3.2.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}