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	1.0.0
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

name: SlackAudit - User email linked to account changed.
id: 9d85feb3-7f54-4181-b143-68abb1a86823
description: |
    'Detects when user email linked to account changes.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: FullName
  entityType: Account
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
version: 1.0.0
triggerOperator: gt
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  
tactics:
- InitialAccess
kind: Scheduled
queryFrequency: 1h
severity: Medium
queryPeriod: 14d
requiredDataConnectors:
- dataTypes:
  - SlackAudit_CL
  connectorId: SlackAuditAPI
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditUserEmailChanged.yaml
relevantTechniques:
- T1078

ARM