Mimecast Secure Email Gateway - Internal Email Protect

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Id	d3bd7640-3600-49f9-8d10-6fe312e68b4f
Rulename	Mimecast Secure Email Gateway - Internal Email Protect
Description	Detects threats from internal email threat protection.
Severity	High
Tactics	LateralMovement Persistence Exfiltration
Techniques	T1534 T1546
Required data connectors	MimecastSEGAPI
Kind	Scheduled
Query frequency	15m
Query period	15m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastSEG/MimecastCG_Internal_Mail_Protect.yaml
Version	1.0.0
Arm template	d3bd7640-3600-49f9-8d10-6fe312e68b4f.json

KQL

MimecastCG
| where Type == "email_iep"
| extend  SenderEnvelope = ['Sender Envelope']  , MessageId = ['Message ID']

YAML

version: 1.0.0
queryPeriod: 15m
enabled: true
suppressionDuration: 5h
id: d3bd7640-3600-49f9-8d10-6fe312e68b4f
status: Available
kind: Scheduled
severity: High
relevantTechniques:
- T1534
- T1546
requiredDataConnectors:
- connectorId: MimecastSEGAPI
  dataTypes:
  - MimecastCG
suppressionEnabled: false
triggerThreshold: 0
queryFrequency: 15m
name: Mimecast Secure Email Gateway - Internal Email Protect
tactics:
- LateralMovement
- Persistence
- Exfiltration
description: |
    'Detects threats from internal email threat protection.'
triggerOperator: gt
eventGroupingSettings:
  aggregationKind: AlertPerResult
entityMappings:
- fieldMappings:
  - columnName: SenderEnvelope
    identifier: Sender
  - columnName: Recipients
    identifier: Recipient
  - columnName: MessageId
    identifier: InternetMessageId
  entityType: MailMessage
query: |
  MimecastCG
  | where Type == "email_iep"
  | extend  SenderEnvelope = ['Sender Envelope']  , MessageId = ['Message ID']  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastSEG/MimecastCG_Internal_Mail_Protect.yaml
incidentConfiguration:
  groupingConfiguration:
    matchingMethod: AllEntities
    reopenClosedIncident: false
    lookbackDuration: P7D
    enabled: true
  createIncident: true

ARM