Tenablead DCShadow

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Id	861044f3-6eef-4f79-8609-e3764abb02f4
Rulename	Tenable.ad DCShadow
Description	Searches for DCShadow attacks.
Severity	High
Tactics	DefenseEvasion
Techniques	T1207
Required data connectors	Tenable.ad
Kind	Scheduled
Query frequency	2h
Query period	2h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/TenableAD/Analytic Rules/TenableAdDCShadow.yaml
Version	1.0.1
Arm template	861044f3-6eef-4f79-8609-e3764abb02f4.json

KQL

// For the query to work properly, make sure you have imported the afad_parser.kql parser into the workspace
// Retrieve the parser here: https://raw.githubusercontent.com/tenable/Azure-Sentinel/Tenable.ad-connector/Solutions/TenableAD/Parsers/afad_parser.kql
// Then, create the Kusto Function with alias afad_parser
afad_parser
  | where MessageType == 2 and Codename == "DCShadow"
  | extend HostName = tostring(split(Host, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Host, '.'), 1, -1), '.'))

YAML

triggerThreshold: 0
entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: DnsDomain
requiredDataConnectors:
- dataTypes:
  - Tenable_ad_CL
  connectorId: Tenable.ad
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/TenableAD/Analytic Rules/TenableAdDCShadow.yaml
name: Tenable.ad DCShadow
relevantTechniques:
- T1207
query: |
  // For the query to work properly, make sure you have imported the afad_parser.kql parser into the workspace
  // Retrieve the parser here: https://raw.githubusercontent.com/tenable/Azure-Sentinel/Tenable.ad-connector/Solutions/TenableAD/Parsers/afad_parser.kql
  // Then, create the Kusto Function with alias afad_parser
  afad_parser
    | where MessageType == 2 and Codename == "DCShadow"
    | extend HostName = tostring(split(Host, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Host, '.'), 1, -1), '.'))  
version: 1.0.1
queryPeriod: 2h
kind: Scheduled
id: 861044f3-6eef-4f79-8609-e3764abb02f4
description: |
    'Searches for DCShadow attacks.'
queryFrequency: 2h
severity: High
triggerOperator: gt
tactics:
- DefenseEvasion

ARM