Trust Monitor Event
Id | 8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182 |
Rulename | Trust Monitor Event |
Description | This query identifies when a new trust monitor event is detected. |
Severity | Medium |
Tactics | CredentialAccess |
Techniques | T1528 T1555 |
Kind | Scheduled |
Query frequency | 5m |
Query period | 5m |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/DuoSecurity/TrustMonitorEvent.yaml |
Version | 1.0.4 |
Arm template | 8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182.json |
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])
metadata:
source:
kind: Community
categories:
domains:
- Security - Others
author:
name: SecurityJedi
support:
tier: Community
queryPeriod: 5m
version: 1.0.4
tactics:
- CredentialAccess
queryFrequency: 5m
id: 8dcf7238-a7d0-4cfd-8d0c-b230e3cd9182
triggerOperator: gt
requiredDataConnectors: []
severity: Medium
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
triggerThreshold: 0
relevantTechniques:
- T1528
- T1555
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])
kind: Scheduled
name: Trust Monitor Event
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/DuoSecurity/TrustMonitorEvent.yaml
description: |
'This query identifies when a new trust monitor event is detected.'
{
"$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/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",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CredentialAccess"
],
"techniques": [
"T1528",
"T1555"
],
"templateVersion": "1.0.4",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}