Sentinel One - Alert from custom rule

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Id	5f37de91-ff2b-45fb-9eda-49e9f76a3942
Rulename	Sentinel One - Alert from custom rule
Description	Detects when alert from custom rule received.
Severity	High
Tactics	InitialAccess
Techniques	T1190
Required data connectors	SentinelOne
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/SentinelOne/Analytic Rules/SentinelOneAlertFromCustomRule.yaml
Version	1.0.2
Arm template	5f37de91-ff2b-45fb-9eda-49e9f76a3942.json

KQL

SentinelOne
| where ActivityType == 3608
| extend RuleName = extract(@'Custom Rule:\s(.*?)\sin Group', 1, EventOriginalMessage)
| extend DstHostname = extract(@'detected on\s(\S+)\.', 1, EventOriginalMessage)
| extend HostCustomEntity = DstHostname

YAML

relevantTechniques:
- T1190
queryFrequency: 1h
description: |
    'Detects when alert from custom rule received.'
triggerThreshold: 0
id: 5f37de91-ff2b-45fb-9eda-49e9f76a3942
name: Sentinel One - Alert from custom rule
queryPeriod: 1h
query: |
  SentinelOne
  | where ActivityType == 3608
  | extend RuleName = extract(@'Custom Rule:\s(.*?)\sin Group', 1, EventOriginalMessage)
  | extend DstHostname = extract(@'detected on\s(\S+)\.', 1, EventOriginalMessage)
  | extend HostCustomEntity = DstHostname  
severity: High
triggerOperator: gt
entityMappings:
- fieldMappings:
  - columnName: HostCustomEntity
    identifier: HostName
  entityType: Host
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SentinelOne/Analytic Rules/SentinelOneAlertFromCustomRule.yaml
requiredDataConnectors:
- connectorId: SentinelOne
  dataTypes:
  - SentinelOne
status: Available
version: 1.0.2
tactics:
- InitialAccess
kind: Scheduled

ARM