Microsoft Sentinel Analytic Rules
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Cisco Duo - Multiple admin 2FA failures

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Ide46c5588-e643-4a60-a008-5ba9a4c84328
RulenameCisco Duo - Multiple admin 2FA failures
DescriptionDetects when multiple admin 2FA failures occurs.
SeverityHigh
TacticsInitialAccess
TechniquesT1078
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/CiscoDuoAdminMFAFailures.yaml
Version1.0.1
Arm templatee46c5588-e643-4a60-a008-5ba9a4c84328.json
Deploy To Azure
let threshold = 10;
CiscoDuo
| where DvcAction =~ "admin_2fa_error"
| summarize count() by DstUserName, bin(TimeGenerated, 10m)
| where count_ > threshold
| extend AccountCustomEntity = DstUserName
id: e46c5588-e643-4a60-a008-5ba9a4c84328
name: Cisco Duo - Multiple admin 2FA failures
triggerOperator: gt
status: Available
query: |
  let threshold = 10;
  CiscoDuo
  | where DvcAction =~ "admin_2fa_error"
  | summarize count() by DstUserName, bin(TimeGenerated, 10m)
  | where count_ > threshold
  | extend AccountCustomEntity = DstUserName  
queryPeriod: 1h
requiredDataConnectors:
- connectorId: CiscoDuoSecurity
  dataTypes:
  - CiscoDuo
severity: High
queryFrequency: 1h
relevantTechniques:
- T1078
version: 1.0.1
kind: Scheduled
tactics:
- InitialAccess
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoAdminMFAFailures.yaml
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
  entityType: Account
description: |
    'Detects when multiple admin 2FA failures occurs.'
{
  "$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/e46c5588-e643-4a60-a008-5ba9a4c84328')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/e46c5588-e643-4a60-a008-5ba9a4c84328')]",
      "properties": {
        "alertRuleTemplateName": "e46c5588-e643-4a60-a008-5ba9a4c84328",
        "customDetails": null,
        "description": "'Detects when multiple admin 2FA failures occurs.'\n",
        "displayName": "Cisco Duo - Multiple admin 2FA failures",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoAdminMFAFailures.yaml",
        "query": "let threshold = 10;\nCiscoDuo\n| where DvcAction =~ \"admin_2fa_error\"\n| summarize count() by DstUserName, bin(TimeGenerated, 10m)\n| where count_ > threshold\n| extend AccountCustomEntity = DstUserName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1078"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}