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

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

ARM