Removable storage ONLINE event from secRMM

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Id	A22B2ECF-1478-4400-877E-07A32E53A897
Rulename	Removable storage ONLINE event from secRMM
Description	Detect when a removable storage device is plugged in by the end-user.
Severity	High
Tactics	Collection
Techniques	T1025
Kind	NRT
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Squadra Technologies SecRmm/Analytic Rules/Removable_Storage_ONLINE.yaml
Arm template	A22B2ECF-1478-4400-877E-07A32E53A897.json

KQL

secRMM_CL | where Event_s == "ONLINE" | 
extend AccountCustomEntity = User_s |
extend HostCustomEntity = Computer

YAML

eventGroupingSettings: 
createIncident: true
subTechniques: []
enabled: true
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: AadUserId
    columnName: User_s
- entityType: Host
  fieldMappings:
  - identifier: HostName
    columnName: Computer
incidentConfiguration: 
aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Squadra Technologies SecRmm/Analytic Rules/Removable_Storage_ONLINE.yaml
apiVersion: 2025-09-01
relevantTechniques:
- T1025
query: |
  secRMM_CL | where Event_s == "ONLINE" | 
  extend AccountCustomEntity = User_s |
  extend HostCustomEntity = Computer  
suppressionEnabled: false
severity: High
customDetails: 
kind: NRT
displayName: Removable Storage ONLINE
id: A22B2ECF-1478-4400-877E-07A32E53A897
description: Detect when a removable storage device is plugged in by the end-user.
suppressionDuration: PT5H
name: Removable storage ONLINE event from secRMM
alertDetailsOverride: 
tactics:
- Collection
alertRuleTemplateName: 
groupingConfiguration:
  lookbackDuration: PT5H
  reopenClosedIncident: false
  groupByCustomDetails: []
  enabled: false
  groupByAlertDetails: []
  groupByEntities: []
  matchingMethod: AllEntities

ARM