Multiple Teams deleted by a single user

// Adjust this value to change how many Teams should be deleted before including
let max_delete_count = 3;
// Adjust this value to change the timewindow the query runs over
  OfficeActivity
| where OfficeWorkload =~ "MicrosoftTeams"
| where Operation =~ "TeamDeleted"
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(TeamName, 1000) by UserId
| where array_length(DeletedTeams) > max_delete_count
| extend AccountName = tostring(split(UserId, "@")[0]), AccountUPNSuffix = tostring(split(UserId, "@")[1])

relevantTechniques:
- T1485
- T1489
name: Multiple Teams deleted by a single user
requiredDataConnectors:
- dataTypes:
  - OfficeActivity (Teams)
  connectorId: Office365
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: UserId
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
  entityType: Account
triggerThreshold: 0
id: 173f8699-6af5-484a-8b06-8c47ba89b380
tactics:
- Impact
version: 2.0.4
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft 365/Analytic Rules/MultipleTeamsDeletes.yaml
queryPeriod: 1d
kind: Scheduled
queryFrequency: 1d
severity: Low
status: Available
description: |
  'This detection flags the occurrences of deleting multiple teams within an hour.
  This data is a part of Office 365 Connector in Microsoft Sentinel.'  
query: |
  // Adjust this value to change how many Teams should be deleted before including
  let max_delete_count = 3;
  // Adjust this value to change the timewindow the query runs over
    OfficeActivity
  | where OfficeWorkload =~ "MicrosoftTeams"
  | where Operation =~ "TeamDeleted"
  | summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(TeamName, 1000) by UserId
  | where array_length(DeletedTeams) > max_delete_count
  | extend AccountName = tostring(split(UserId, "@")[0]), AccountUPNSuffix = tostring(split(UserId, "@")[1])  
triggerOperator: gt

{
  "$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/173f8699-6af5-484a-8b06-8c47ba89b380')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/173f8699-6af5-484a-8b06-8c47ba89b380')]",
      "properties": {
        "alertRuleTemplateName": "173f8699-6af5-484a-8b06-8c47ba89b380",
        "customDetails": null,
        "description": "'This detection flags the occurrences of deleting multiple teams within an hour.\nThis data is a part of Office 365 Connector in Microsoft Sentinel.'\n",
        "displayName": "Multiple Teams deleted by a single user",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "UserId",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft 365/Analytic Rules/MultipleTeamsDeletes.yaml",
        "query": "// Adjust this value to change how many Teams should be deleted before including\nlet max_delete_count = 3;\n// Adjust this value to change the timewindow the query runs over\n  OfficeActivity\n| where OfficeWorkload =~ \"MicrosoftTeams\"\n| where Operation =~ \"TeamDeleted\"\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(TeamName, 1000) by UserId\n| where array_length(DeletedTeams) > max_delete_count\n| extend AccountName = tostring(split(UserId, \"@\")[0]), AccountUPNSuffix = tostring(split(UserId, \"@\")[1])\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Low",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1485",
          "T1489"
        ],
        "templateVersion": "2.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}