Mimecast Secure Email Gateway - Attachment Protect

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Id	72bd7b0c-493c-4fa5-8a95-7f6376b6cfb2
Rulename	Mimecast Secure Email Gateway - Attachment Protect
Description	Detect threat for mail attachment under the targeted threat protection.
Severity	High
Tactics	Collection Exfiltration Discovery InitialAccess Execution
Techniques	T1114 T1566 T0865
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_Attachment.yaml
Version	1.0.0
Arm template	72bd7b0c-493c-4fa5-8a95-7f6376b6cfb2.json

KQL

MimecastCG
| where Type == "email_ttp_ap"
| extend  SenderEnvelope = ['Sender Envelope']  , SenderIp = ['Sender IP']

YAML

id: 72bd7b0c-493c-4fa5-8a95-7f6376b6cfb2
suppressionEnabled: false
enabled: true
triggerOperator: gt
entityMappings:
- fieldMappings:
  - identifier: Sender
    columnName: SenderEnvelope
  - identifier: Recipient
    columnName: Recipients
  - identifier: Subject
    columnName: Subject
  entityType: MailMessage
- fieldMappings:
  - identifier: Address
    columnName: SenderIp
  entityType: IP
eventGroupingSettings:
  aggregationKind: AlertPerResult
requiredDataConnectors:
- dataTypes:
  - MimecastCG
  connectorId: MimecastSEGAPI
queryFrequency: 15m
suppressionDuration: 5h
queryPeriod: 15m
status: Available
incidentConfiguration:
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: P7D
  createIncident: true
query: |
  MimecastCG
  | where Type == "email_ttp_ap"
  | extend  SenderEnvelope = ['Sender Envelope']  , SenderIp = ['Sender IP']  
name: Mimecast Secure Email Gateway - Attachment Protect
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastSEG/MimecastCG_Attachment.yaml
tactics:
- Collection
- Exfiltration
- Discovery
- InitialAccess
- Execution
severity: High
relevantTechniques:
- T1114
- T1566
- T0865
triggerThreshold: 0
version: 1.0.0
description: |
    'Detect threat for mail attachment under the targeted threat protection.'

ARM