Dataverse - Bulk record ownership re-assignment or sharing

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Id	6e480329-84bc-409a-b97b-22e8102af3ca
Rulename	Dataverse - Bulk record ownership re-assignment or sharing
Description	Identifies individual record ownership changes including sharing of records with other users/teams or re-assignment of ownership exceeding a pre-defined threshold.
Severity	Medium
Tactics	PrivilegeEscalation
Techniques	T1548
Required data connectors	Dataverse
Kind	Scheduled
Query frequency	1h
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Dataverse - Bulk record ownership re-assignment or sharing.yaml
Version	3.2.0
Arm template	6e480329-84bc-409a-b97b-22e8102af3ca.json

KQL

// Set threshold for number of shared/assigned records
let detection_threshold = 100;
let query_frequency = 1h;
DataverseActivity
| where TimeGenerated >= ago(query_frequency)
| where Message in ("ModifyAccess", "Assign", "GrantAccess")
| summarize
    FirstEvent = min(TimeGenerated),
    LastEvent = max(TimeGenerated),
    Events = count()
    by UserId, Message, InstanceUrl, ClientIp
| where Events > detection_threshold
| extend
    CloudAppId = int(32780),
    AccountName = tostring(split(UserId, '@')[0]),
    UPNSuffix = tostring(split(UserId, '@')[1])
| project
    FirstEvent,
    LastEvent,
    Message,
    Events,
    UserId,
    ClientIp,
    InstanceUrl,
    CloudAppId,
    AccountName,
    UPNSuffix

YAML

relevantTechniques:
- T1548
name: Dataverse - Bulk record ownership re-assignment or sharing
queryPeriod: 1d
triggerThreshold: 0
alertDetailsOverride:
  alertDescriptionFormat: '{{Events}} events of type {{Message}} detected in {{InstanceUrl}} could indicate suspicious or malicious activity.'
  alertDisplayNameFormat: Dataverse - High number of record access modification events detected
id: 6e480329-84bc-409a-b97b-22e8102af3ca
eventGroupingSettings:
  aggregationKind: AlertPerResult
severity: Medium
requiredDataConnectors:
- dataTypes:
  - DataverseActivity
  connectorId: Dataverse
description: Identifies individual record ownership changes including sharing of records with other users/teams or re-assignment of ownership exceeding a pre-defined threshold.
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:
- PrivilegeEscalation
query: |
  // Set threshold for number of shared/assigned records
  let detection_threshold = 100;
  let query_frequency = 1h;
  DataverseActivity
  | where TimeGenerated >= ago(query_frequency)
  | where Message in ("ModifyAccess", "Assign", "GrantAccess")
  | summarize
      FirstEvent = min(TimeGenerated),
      LastEvent = max(TimeGenerated),
      Events = count()
      by UserId, Message, InstanceUrl, ClientIp
  | where Events > detection_threshold
  | extend
      CloudAppId = int(32780),
      AccountName = tostring(split(UserId, '@')[0]),
      UPNSuffix = tostring(split(UserId, '@')[1])
  | project
      FirstEvent,
      LastEvent,
      Message,
      Events,
      UserId,
      ClientIp,
      InstanceUrl,
      CloudAppId,
      AccountName,
      UPNSuffix  
kind: Scheduled
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Business Applications/Analytic Rules/Dataverse - Bulk record ownership re-assignment or sharing.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/6e480329-84bc-409a-b97b-22e8102af3ca')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6e480329-84bc-409a-b97b-22e8102af3ca')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Events}} events of type {{Message}} detected in {{InstanceUrl}} could indicate suspicious or malicious activity.",
          "alertDisplayNameFormat": "Dataverse - High number of record access modification events detected"
        },
        "alertRuleTemplateName": "6e480329-84bc-409a-b97b-22e8102af3ca",
        "customDetails": null,
        "description": "Identifies individual record ownership changes including sharing of records with other users/teams or re-assignment of ownership exceeding a pre-defined threshold.",
        "displayName": "Dataverse - Bulk record ownership re-assignment or sharing",
        "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 - Bulk record ownership re-assignment or sharing.yaml",
        "query": "// Set threshold for number of shared/assigned records\nlet detection_threshold = 100;\nlet query_frequency = 1h;\nDataverseActivity\n| where TimeGenerated >= ago(query_frequency)\n| where Message in (\"ModifyAccess\", \"Assign\", \"GrantAccess\")\n| summarize\n    FirstEvent = min(TimeGenerated),\n    LastEvent = max(TimeGenerated),\n    Events = count()\n    by UserId, Message, InstanceUrl, ClientIp\n| where Events > detection_threshold\n| extend\n    CloudAppId = int(32780),\n    AccountName = tostring(split(UserId, '@')[0]),\n    UPNSuffix = tostring(split(UserId, '@')[1])\n| project\n    FirstEvent,\n    LastEvent,\n    Message,\n    Events,\n    UserId,\n    ClientIp,\n    InstanceUrl,\n    CloudAppId,\n    AccountName,\n    UPNSuffix\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1548"
        ],
        "templateVersion": "3.2.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}