Digital Guardian - Possible SMTP protocol abuse
Id | a374a933-f6c4-4200-8682-70402a9054dd |
Rulename | Digital Guardian - Possible SMTP protocol abuse |
Description | Detects possible SMTP protocol abuse. |
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/DigitalGuardianPossibleProtocolAbuse.yaml |
Version | 1.0.1 |
Arm template | a374a933-f6c4-4200-8682-70402a9054dd.json |
DigitalGuardianDLPEvent
| where NetworkApplicationProtocol =~ 'SMTP'
| where DstPortNumber != 25
| extend AccountCustomEntity = SrcUserName
id: a374a933-f6c4-4200-8682-70402a9054dd
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianPossibleProtocolAbuse.yaml
requiredDataConnectors:
- dataTypes:
- DigitalGuardianDLPEvent
connectorId: DigitalGuardianDLP
- datatypes:
- Syslog
connectorId: SyslogAma
description: |
'Detects possible SMTP protocol abuse.'
severity: High
queryPeriod: 1h
kind: Scheduled
tactics:
- Exfiltration
queryFrequency: 1h
query: |
DigitalGuardianDLPEvent
| where NetworkApplicationProtocol =~ 'SMTP'
| where DstPortNumber != 25
| extend AccountCustomEntity = SrcUserName
version: 1.0.1
triggerThreshold: 0
name: Digital Guardian - Possible SMTP protocol abuse
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/a374a933-f6c4-4200-8682-70402a9054dd')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a374a933-f6c4-4200-8682-70402a9054dd')]",
"properties": {
"alertRuleTemplateName": "a374a933-f6c4-4200-8682-70402a9054dd",
"customDetails": null,
"description": "'Detects possible SMTP protocol abuse.'\n",
"displayName": "Digital Guardian - Possible SMTP protocol abuse",
"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/DigitalGuardianPossibleProtocolAbuse.yaml",
"query": "DigitalGuardianDLPEvent\n| where NetworkApplicationProtocol =~ 'SMTP'\n| where DstPortNumber != 25\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"
}
]
}