Google DNS - Exchange online autodiscover abuse
Id | 424c2aca-5367-4247-917a-5d0f7035e40e |
Rulename | Google DNS - Exchange online autodiscover abuse |
Description | Detects possible Exchange online autodiscover abuse. |
Severity | Medium |
Tactics | InitialAccess CredentialAccess |
Techniques | T1566 T1187 |
Required data connectors | GCPDNSDataConnector |
Kind | Scheduled |
Query frequency | 1h |
Query period | 1h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSExchangeAutodiscoverAbuse.yaml |
Version | 1.0.0 |
Arm template | 424c2aca-5367-4247-917a-5d0f7035e40e.json |
GCPCloudDNS
| where Query has_any ('autodiscover.com.br', 'autodiscover.com.cn', 'autodiscover.com.co', 'autodiscover.es', 'autodiscover.fr', 'autodiscover.in', 'autodiscover.it', 'autodiscover.sg', 'autodiscover.uk', 'autodiscover.xyz', 'autodiscover.online')
| extend DNSCustomEntity = Query, IPCustomEntity = SrcIpAddr
queryFrequency: 1h
description: |
'Detects possible Exchange online autodiscover abuse.'
severity: Medium
version: 1.0.0
relevantTechniques:
- T1566
- T1187
name: Google DNS - Exchange online autodiscover abuse
triggerThreshold: 0
kind: Scheduled
query: |
GCPCloudDNS
| where Query has_any ('autodiscover.com.br', 'autodiscover.com.cn', 'autodiscover.com.co', 'autodiscover.es', 'autodiscover.fr', 'autodiscover.in', 'autodiscover.it', 'autodiscover.sg', 'autodiscover.uk', 'autodiscover.xyz', 'autodiscover.online')
| extend DNSCustomEntity = Query, IPCustomEntity = SrcIpAddr
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSExchangeAutodiscoverAbuse.yaml
requiredDataConnectors:
- connectorId: GCPDNSDataConnector
dataTypes:
- GCPCloudDNS
tactics:
- InitialAccess
- CredentialAccess
id: 424c2aca-5367-4247-917a-5d0f7035e40e
queryPeriod: 1h
entityMappings:
- fieldMappings:
- columnName: DNSCustomEntity
identifier: DomainName
entityType: DNS
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
{
"$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/424c2aca-5367-4247-917a-5d0f7035e40e')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/424c2aca-5367-4247-917a-5d0f7035e40e')]",
"properties": {
"alertRuleTemplateName": "424c2aca-5367-4247-917a-5d0f7035e40e",
"customDetails": null,
"description": "'Detects possible Exchange online autodiscover abuse.'\n",
"displayName": "Google DNS - Exchange online autodiscover abuse",
"enabled": true,
"entityMappings": [
{
"entityType": "DNS",
"fieldMappings": [
{
"columnName": "DNSCustomEntity",
"identifier": "DomainName"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSExchangeAutodiscoverAbuse.yaml",
"query": "GCPCloudDNS\n| where Query has_any ('autodiscover.com.br', 'autodiscover.com.cn', 'autodiscover.com.co', 'autodiscover.es', 'autodiscover.fr', 'autodiscover.in', 'autodiscover.it', 'autodiscover.sg', 'autodiscover.uk', 'autodiscover.xyz', 'autodiscover.online')\n| extend DNSCustomEntity = Query, IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CredentialAccess",
"InitialAccess"
],
"techniques": [
"T1187",
"T1566"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}