SlackAudit - Empty User Agent

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Id	04528635-a5f1-438b-ab74-21ca7bc3aa32
Rulename	SlackAudit - Empty User Agent
Description	This query shows connections to the Slack Workspace with empty User Agent.
Severity	Low
Tactics	InitialAccess
Techniques	T1133
Required data connectors	SlackAuditAPI
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditEmptyUA.yaml
Version	1.0.1
Arm template	04528635-a5f1-438b-ab74-21ca7bc3aa32.json

KQL

SlackAudit
| where isempty(UserAgentOriginal)
| extend AccountCustomEntity = SrcUserName
| project TimeGenerated, AccountCustomEntity, SrcUserName, UserAgentOriginal

YAML

entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
tactics:
- InitialAccess
requiredDataConnectors:
- dataTypes:
  - SlackAudit_CL
  connectorId: SlackAuditAPI
alertDetailsOverride:
  alertDisplayNameFormat: Slack audit empty user agent for {{SrcUserName}}
  alertDescriptionFormat: Slack activity from {{SrcUserName}} at {{TimeGenerated}}.
id: 04528635-a5f1-438b-ab74-21ca7bc3aa32
severity: Low
status: Available
customDetails:
  UserAgent: UserAgentOriginal
  SlackUser: SrcUserName
query: |
  SlackAudit
  | where isempty(UserAgentOriginal)
  | extend AccountCustomEntity = SrcUserName
  | project TimeGenerated, AccountCustomEntity, SrcUserName, UserAgentOriginal  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditEmptyUA.yaml
kind: Scheduled
queryPeriod: 1d
version: 1.0.1
name: SlackAudit - Empty User Agent
queryFrequency: 1d
triggerThreshold: 0
relevantTechniques:
- T1133
description: |
    'This query shows connections to the Slack Workspace with empty User Agent.'
triggerOperator: gt

ARM