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

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

ARM