Microsoft Sentinel Analytic Rules
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Cisco Duo - Multiple users deleted

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Id6e4f9031-91d3-4fa1-8baf-624935f04ad8
RulenameCisco Duo - Multiple users deleted
DescriptionDetects when multiple users were deleted.
SeverityMedium
TacticsImpact
TechniquesT1531
Required data connectorsCiscoDuoSecurity
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoMultipleUsersDeleted.yaml
Version1.0.0
Arm template6e4f9031-91d3-4fa1-8baf-624935f04ad8.json
Deploy To Azure
CiscoDuo
| where DvcAction =~ "user_delete"
| summarize count() by DstUserName, bin(TimeGenerated, 10m)
| where count_ > 1
| extend AccountCustomEntity = DstUserName
queryFrequency: 1h
tactics:
- Impact
queryPeriod: 1h
kind: Scheduled
relevantTechniques:
- T1531
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoMultipleUsersDeleted.yaml
description: |
    'Detects when multiple users were deleted.'
requiredDataConnectors:
- dataTypes:
  - CiscoDuo
  connectorId: CiscoDuoSecurity
version: 1.0.0
triggerThreshold: 0
severity: Medium
triggerOperator: gt
id: 6e4f9031-91d3-4fa1-8baf-624935f04ad8
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
status: Available
name: Cisco Duo - Multiple users deleted
query: |
  CiscoDuo
  | where DvcAction =~ "user_delete"
  | summarize count() by DstUserName, bin(TimeGenerated, 10m)
  | where count_ > 1
  | extend AccountCustomEntity = DstUserName  
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/6e4f9031-91d3-4fa1-8baf-624935f04ad8')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6e4f9031-91d3-4fa1-8baf-624935f04ad8')]",
      "properties": {
        "alertRuleTemplateName": "6e4f9031-91d3-4fa1-8baf-624935f04ad8",
        "customDetails": null,
        "description": "'Detects when multiple users were deleted.'\n",
        "displayName": "Cisco Duo - Multiple users deleted",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoMultipleUsersDeleted.yaml",
        "query": "CiscoDuo\n| where DvcAction =~ \"user_delete\"\n| summarize count() by DstUserName, bin(TimeGenerated, 10m)\n| where count_ > 1\n| extend AccountCustomEntity = DstUserName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1531"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}