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
queryFrequency: 1h
description: |
'Detects when user email linked to account changes.'
name: SlackAudit - User email linked to account changed.
relevantTechniques:
- T1078
triggerThreshold: 0
status: Available
id: 9d85feb3-7f54-4181-b143-68abb1a86823
requiredDataConnectors:
- dataTypes:
- SlackAudit_CL
connectorId: SlackAuditAPI
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
queryPeriod: 14d
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
kind: Scheduled
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditUserEmailChanged.yaml
version: 1.0.0
triggerOperator: gt
tactics:
- InitialAccess
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/9d85feb3-7f54-4181-b143-68abb1a86823')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9d85feb3-7f54-4181-b143-68abb1a86823')]",
"properties": {
"alertRuleTemplateName": "9d85feb3-7f54-4181-b143-68abb1a86823",
"customDetails": null,
"description": "'Detects when user email linked to account changes.'\n",
"displayName": "SlackAudit - User email linked to account changed.",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "FullName"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SlackAudit/Analytic Rules/SlackAuditUserEmailChanged.yaml",
"query": "SlackAudit\n| where TimeGenerated between (ago(14d) .. (1d))\n| summarize max(TimeGenerated) by SrcUserName, SrcUserEmail\n| join (SlackAudit \n | where Action =~ 'user_login'\n | project SrcIpAddr, SrcUserName, NewUserEmail = SrcUserEmail) on SrcUserName\n| where NewUserEmail != SrcUserEmail\n| extend AccountCustomEntity = SrcUserName\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1078"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}