DigitalGuardianDLPEvent
| where NetworkApplicationProtocol =~ 'SMTP'
| where DstPortNumber != 25
| extend AccountCustomEntity = SrcUserName
version: 1.0.0
status: Available
queryFrequency: 1h
requiredDataConnectors:
- connectorId: DigitalGuardianDLP
dataTypes:
- DigitalGuardianDLPEvent
entityMappings:
- fieldMappings:
- columnName: AccountCustomEntity
identifier: Name
entityType: Account
kind: Scheduled
queryPeriod: 1h
severity: High
query: |
DigitalGuardianDLPEvent
| where NetworkApplicationProtocol =~ 'SMTP'
| where DstPortNumber != 25
| extend AccountCustomEntity = SrcUserName
triggerOperator: gt
id: a374a933-f6c4-4200-8682-70402a9054dd
description: |
'Detects possible SMTP protocol abuse.'
triggerThreshold: 0
name: Digital Guardian - Possible SMTP protocol abuse
relevantTechniques:
- T1048
tactics:
- Exfiltration
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/DigitalGuardianDLP/Analytic Rules/DigitalGuardianPossibleProtocolAbuse.yaml
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/a374a933-f6c4-4200-8682-70402a9054dd')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a374a933-f6c4-4200-8682-70402a9054dd')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Digital Guardian - Possible SMTP protocol abuse",
"description": "'Detects possible SMTP protocol abuse.'\n",
"severity": "High",
"enabled": true,
"query": "DigitalGuardianDLPEvent\n| where NetworkApplicationProtocol =~ 'SMTP'\n| where DstPortNumber != 25\n| extend AccountCustomEntity = SrcUserName\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Exfiltration"
],
"techniques": [
"T1048"
],
"alertRuleTemplateName": "a374a933-f6c4-4200-8682-70402a9054dd",
"customDetails": null,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"identifier": "Name",
"columnName": "AccountCustomEntity"
}
]
}
],
"status": "Available",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/DigitalGuardianDLP/Analytic Rules/DigitalGuardianPossibleProtocolAbuse.yaml",
"templateVersion": "1.0.0"
}
}
]
}