SlackAudit - User email linked to account changed

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Id	9d85feb3-7f54-4181-b143-68abb1a86823
Rulename	SlackAudit - User email linked to account changed.
Description	Detects when user email linked to account changes.
Severity	Medium
Tactics	InitialAccess
Techniques	T1078
Required data connectors	SlackAuditAPI
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditUserEmailChanged.yaml
Version	1.0.1
Arm template	9d85feb3-7f54-4181-b143-68abb1a86823.json

KQL

SlackAudit
| where TimeGenerated between (ago(14d) .. (1d))
| summarize max(TimeGenerated) by SrcUserName, SrcUserEmail
| join (SlackAudit 
      | where Action =~ 'user_login'
      | project SrcIpAddr, SrcUserName, NewUserEmail = SrcUserEmail) on SrcUserName
| where NewUserEmail != SrcUserEmail
| extend AccountCustomEntity = SrcUserName
| extend IPCustomEntity = SrcIpAddr

YAML

entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
tactics:
- InitialAccess
requiredDataConnectors:
- dataTypes:
  - SlackAudit_CL
  connectorId: SlackAuditAPI
alertDetailsOverride:
  alertDisplayNameFormat: Slack user email changed for {{SrcUserName}}
  alertDescriptionFormat: Slack audit detected a user email change for {{SrcUserName}} from {{SrcUserEmail}} to {{NewUserEmail}}.
id: 9d85feb3-7f54-4181-b143-68abb1a86823
severity: Medium
status: Available
customDetails:
  OriginalUserEmail: SrcUserEmail
  SourceUserName: SrcUserName
  NewUserEmail: NewUserEmail
  SourceIpAddress: SrcIpAddr
query: |
  SlackAudit
  | where TimeGenerated between (ago(14d) .. (1d))
  | summarize max(TimeGenerated) by SrcUserName, SrcUserEmail
  | join (SlackAudit 
        | where Action =~ 'user_login'
        | project SrcIpAddr, SrcUserName, NewUserEmail = SrcUserEmail) on SrcUserName
  | where NewUserEmail != SrcUserEmail
  | extend AccountCustomEntity = SrcUserName
  | extend IPCustomEntity = SrcIpAddr  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditUserEmailChanged.yaml
kind: Scheduled
queryPeriod: 14d
version: 1.0.1
name: SlackAudit - User email linked to account changed.
queryFrequency: 1h
triggerThreshold: 0
relevantTechniques:
- T1078
description: |
    'Detects when user email linked to account changes.'
triggerOperator: gt

ARM