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

tactics:
- LateralMovement
- Persistence
- Exfiltration
relevantTechniques:
- T1534
- T1546
version: 1.0.0
triggerOperator: gt
name: Mimecast Secure Email Gateway - Internal Email Protect
id: d3bd7640-3600-49f9-8d10-6fe312e68b4f
description: |
    'Detects threats from internal email threat protection.'
incidentConfiguration:
  groupingConfiguration:
    enabled: true
    matchingMethod: AllEntities
    reopenClosedIncident: false
    lookbackDuration: P7D
  createIncident: true
suppressionEnabled: false
suppressionDuration: 5h
queryFrequency: 15m
enabled: true
severity: High
eventGroupingSettings:
  aggregationKind: AlertPerResult
status: Available
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
queryPeriod: 15m
triggerThreshold: 0
kind: Scheduled
entityMappings:
- fieldMappings:
  - identifier: Sender
    columnName: SenderEnvelope
  - identifier: Recipient
    columnName: Recipients
  - identifier: InternetMessageId
    columnName: MessageId
  entityType: MailMessage
requiredDataConnectors:
- dataTypes:
  - MimecastCG
  connectorId: MimecastSEGAPI

ARM