Box - New external user

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Id	fd36ac88-cd92-4137-aa23-37a3648621fa
Rulename	Box - New external user
Description	Detects when new user created with SourceLogin containing non-corporate domain.
Severity	Medium
Tactics	InitialAccess Persistence
Techniques	T1078
Required data connectors	BoxDataConnector
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/Box/Analytic Rules/BoxNewExternalUser.yaml
Version	1.0.0
Arm template	fd36ac88-cd92-4137-aa23-37a3648621fa.json

KQL

BoxEvents
| where EventType =~ 'NEW_USER'
| extend corp_domain = extract(@'@(.*)', 1, SourceLogin)
| extend new_domain = tolower(extract(@'@(.*)', 1, SourceLogin))
| where corp_domain != new_domain
| extend AccountCustomEntity = SourceLogin
| extend IPCustomEntity = SrcIpAddr

YAML

triggerThreshold: 0
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
requiredDataConnectors:
- dataTypes:
  - BoxEvents_CL
  connectorId: BoxDataConnector
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Box/Analytic Rules/BoxNewExternalUser.yaml
name: Box - New external user
relevantTechniques:
- T1078
status: Available
version: 1.0.0
queryPeriod: 1h
kind: Scheduled
id: fd36ac88-cd92-4137-aa23-37a3648621fa
query: |
  BoxEvents
  | where EventType =~ 'NEW_USER'
  | extend corp_domain = extract(@'@(.*)', 1, SourceLogin)
  | extend new_domain = tolower(extract(@'@(.*)', 1, SourceLogin))
  | where corp_domain != new_domain
  | extend AccountCustomEntity = SourceLogin
  | extend IPCustomEntity = SrcIpAddr  
description: |
    'Detects when new user created with SourceLogin containing non-corporate domain.'
queryFrequency: 1h
severity: Medium
triggerOperator: gt
tactics:
- InitialAccess
- Persistence

ARM