Cisco Duo - Multiple admin 2FA failures

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Id	e46c5588-e643-4a60-a008-5ba9a4c84328
Rulename	Cisco Duo - Multiple admin 2FA failures
Description	Detects when multiple admin 2FA failures occurs.
Severity	High
Tactics	InitialAccess
Techniques	T1078
Required data connectors	CiscoDuoSecurity
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoAdminMFAFailures.yaml
Version	1.0.1
Arm template	e46c5588-e643-4a60-a008-5ba9a4c84328.json

KQL

let threshold = 10;
CiscoDuo
| where DvcAction =~ "admin_2fa_error"
| summarize count() by DstUserName, bin(TimeGenerated, 10m)
| where count_ > threshold
| extend AccountCustomEntity = DstUserName

YAML

name: Cisco Duo - Multiple admin 2FA failures
id: e46c5588-e643-4a60-a008-5ba9a4c84328
description: |
    'Detects when multiple admin 2FA failures occurs.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
version: 1.0.1
triggerOperator: gt
query: |
  let threshold = 10;
  CiscoDuo
  | where DvcAction =~ "admin_2fa_error"
  | summarize count() by DstUserName, bin(TimeGenerated, 10m)
  | where count_ > threshold
  | extend AccountCustomEntity = DstUserName  
tactics:
- InitialAccess
kind: Scheduled
queryFrequency: 1h
severity: High
queryPeriod: 1h
requiredDataConnectors:
- dataTypes:
  - CiscoDuo
  connectorId: CiscoDuoSecurity
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoDuoSecurity/Analytic Rules/CiscoDuoAdminMFAFailures.yaml
relevantTechniques:
- T1078

ARM