Office 365 - Multiple Teams deleted by a single user

let max_delete_count = 3;
EnrichedMicrosoft365AuditLogs
| where Workload =~ "MicrosoftTeams"
| where Operation =~ "TeamDeleted"
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(tostring(AdditionalProperties.TeamName), 1000) by UserId
| where array_length(DeletedTeams) > max_delete_count
| extend AccountName = tostring(split(UserId, "@")[0]), AccountUPNSuffix = tostring(split(UserId, "@")[1])

queryPeriod: 1d
version: 2.0.5
tactics:
- Impact
queryFrequency: 1d
id: db60e4b6-a845-4f28-a18c-94ebbaad6c6c
triggerOperator: gt
requiredDataConnectors:
- dataTypes:
  - EnrichedMicrosoft365AuditLogs
  connectorId: AzureActiveDirectory
severity: Low
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: UserId
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountUPNSuffix
    identifier: UPNSuffix
triggerThreshold: 0
relevantTechniques:
- T1485
- T1489
query: |
  let max_delete_count = 3;
  EnrichedMicrosoft365AuditLogs
  | where Workload =~ "MicrosoftTeams"
  | where Operation =~ "TeamDeleted"
  | summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(tostring(AdditionalProperties.TeamName), 1000) by UserId
  | where array_length(DeletedTeams) > max_delete_count
  | extend AccountName = tostring(split(UserId, "@")[0]), AccountUPNSuffix = tostring(split(UserId, "@")[1])  
kind: Scheduled
name: Office 365 - Multiple Teams deleted by a single user
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Global Secure Access/Analytic Rules/Office 365 - MultipleTeamsDeletes.yaml
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.'  
status: Available

{
  "$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/db60e4b6-a845-4f28-a18c-94ebbaad6c6c')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/db60e4b6-a845-4f28-a18c-94ebbaad6c6c')]",
      "properties": {
        "alertRuleTemplateName": "db60e4b6-a845-4f28-a18c-94ebbaad6c6c",
        "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": "Office 365 - 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/Global Secure Access/Analytic Rules/Office 365 - MultipleTeamsDeletes.yaml",
        "query": "let max_delete_count = 3;\nEnrichedMicrosoft365AuditLogs\n| where Workload =~ \"MicrosoftTeams\"\n| where Operation =~ \"TeamDeleted\"\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), DeletedTeams = make_set(tostring(AdditionalProperties.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": "2.0.5",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}