let timeframe = ago(5m);
DuoSecurityTrustMonitor_CL
| where TimeGenerated >= timeframe
| extend AccountName = tostring(split(surfaced_auth_user_name_s, "@")[0]), AccountUPNSuffix = tostring(split(surfaced_auth_user_name_s, "@")[1])
query: |
let timeframe = ago(5m);
DuoSecurityTrustMonitor_CL
| where TimeGenerated >= timeframe
| extend AccountName = tostring(split(surfaced_auth_user_name_s, "@")[0]), AccountUPNSuffix = tostring(split(surfaced_auth_user_name_s, "@")[1])
name: Trust Monitor Event
requiredDataConnectors: []
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: surfaced_auth_user_name_s
- identifier: Name
columnName: AccountName
- identifier: UPNSuffix
columnName: AccountUPNSuffix
- entityType: IP
fieldMappings:
- identifier: Address
columnName: surfaced_auth_access_device_ip_s
description: |
'This query identifies when a new trust monitor event is detected.'
kind: Scheduled
severity: Medium
triggerThreshold: 0
queryPeriod: 5m
queryFrequency: 5m
triggerOperator: gt
metadata:
author:
name: SecurityJedi
source:
kind: Community
categories:
domains:
- Security - Others
support:
tier: Community
tactics:
- CredentialAccess
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/DuoSecurity/TrustMonitorEvent.yaml
id: 8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182
version: 1.0.3
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2023-02-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182')]",
"properties": {
"alertRuleTemplateName": "8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182",
"customDetails": null,
"description": "'This query identifies when a new trust monitor event is detected.'\n",
"displayName": "Trust Monitor Event",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "surfaced_auth_user_name_s",
"identifier": "FullName"
},
{
"columnName": "AccountName",
"identifier": "Name"
},
{
"columnName": "AccountUPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "surfaced_auth_access_device_ip_s",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/DuoSecurity/TrustMonitorEvent.yaml",
"query": "let timeframe = ago(5m);\nDuoSecurityTrustMonitor_CL\n| where TimeGenerated >= timeframe\n| extend AccountName = tostring(split(surfaced_auth_user_name_s, \"@\")[0]), AccountUPNSuffix = tostring(split(surfaced_auth_user_name_s, \"@\")[1])\n",
"queryFrequency": "PT5M",
"queryPeriod": "PT5M",
"severity": "Medium",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CredentialAccess"
],
"templateVersion": "1.0.3",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}