Digital Guardian - Possible SMTP protocol abuse

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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	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	1.0.2
Arm template	a374a933-f6c4-4200-8682-70402a9054dd.json

KQL

DigitalGuardianDLPEvent
| where NetworkApplicationProtocol =~ 'SMTP'
| where DstPortNumber != 25
| extend AccountCustomEntity = SrcUserName

YAML

name: Digital Guardian - Possible SMTP protocol abuse
id: a374a933-f6c4-4200-8682-70402a9054dd
query: |
  DigitalGuardianDLPEvent
  | where NetworkApplicationProtocol =~ 'SMTP'
  | where DstPortNumber != 25
  | extend AccountCustomEntity = SrcUserName  
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
relevantTechniques:
- T1048
description: |
    'Detects possible SMTP protocol abuse.'
queryPeriod: 1h
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianPossibleProtocolAbuse.yaml
kind: Scheduled
triggerOperator: gt
severity: High
version: 1.0.2
queryFrequency: 1h
tactics:
- Exfiltration
triggerThreshold: 0
requiredDataConnectors:
- connectorId: SyslogAma
  datatypes:
  - Syslog

ARM