Digital Guardian - Exfiltration using DNS protocol
Id | 39e25deb-49bb-4cdb-89c1-c466d596e2bd |
Rulename | Digital Guardian - Exfiltration using DNS protocol |
Description | Detects exfiltration using DNS protocol. |
Severity | High |
Tactics | Exfiltration |
Techniques | T1048 |
Required data connectors | DigitalGuardianDLP SyslogAma |
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/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianExfiltrationOverDNS.yaml |
Version | 1.0.1 |
Arm template | 39e25deb-49bb-4cdb-89c1-c466d596e2bd.json |
DigitalGuardianDLPEvent
| where DstPortNumber == 53
| extend AccountCustomEntity = SrcUserName
id: 39e25deb-49bb-4cdb-89c1-c466d596e2bd
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianExfiltrationOverDNS.yaml
requiredDataConnectors:
- dataTypes:
- DigitalGuardianDLPEvent
connectorId: DigitalGuardianDLP
- datatypes:
- Syslog
connectorId: SyslogAma
description: |
'Detects exfiltration using DNS protocol.'
severity: High
queryPeriod: 1h
kind: Scheduled
tactics:
- Exfiltration
queryFrequency: 1h
query: |
DigitalGuardianDLPEvent
| where DstPortNumber == 53
| extend AccountCustomEntity = SrcUserName
version: 1.0.1
triggerThreshold: 0
name: Digital Guardian - Exfiltration using DNS protocol
entityMappings:
- entityType: Account
fieldMappings:
- columnName: AccountCustomEntity
identifier: Name
status: Available
relevantTechniques:
- T1048
{
"$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/39e25deb-49bb-4cdb-89c1-c466d596e2bd')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/39e25deb-49bb-4cdb-89c1-c466d596e2bd')]",
"properties": {
"alertRuleTemplateName": "39e25deb-49bb-4cdb-89c1-c466d596e2bd",
"customDetails": null,
"description": "'Detects exfiltration using DNS protocol.'\n",
"displayName": "Digital Guardian - Exfiltration using DNS protocol",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "Name"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianExfiltrationOverDNS.yaml",
"query": "DigitalGuardianDLPEvent\n| where DstPortNumber == 53\n| extend AccountCustomEntity = SrcUserName\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "High",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Exfiltration"
],
"techniques": [
"T1048"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}