Mimecast Secure Email Gateway - Spam Event Thread

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Id	0cda82c8-e8f0-4117-896e-a10f1b43e64a
Rulename	Mimecast Secure Email Gateway - Spam Event Thread
Description	Detects threat from spam event thread protection logs.
Severity	Low
Tactics	Discovery
Techniques	T1083
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_Spam_Event.yaml
Version	1.0.0
Arm template	0cda82c8-e8f0-4117-896e-a10f1b43e64a.json

KQL

MimecastCG
| where Type == "email_spam"
| extend  SenderEnvelope = ['Sender Envelope']

YAML

relevantTechniques:
- T1083
entityMappings:
- entityType: MailMessage
  fieldMappings:
  - columnName: SenderEnvelope
    identifier: Sender
  - columnName: Recipients
    identifier: Recipient
  - columnName: Subject
    identifier: Subject
suppressionEnabled: false
version: 1.0.0
query: |
  MimecastCG
  | where Type == "email_spam"
  | extend  SenderEnvelope = ['Sender Envelope']   
id: 0cda82c8-e8f0-4117-896e-a10f1b43e64a
suppressionDuration: 5h
severity: Low
kind: Scheduled
queryFrequency: 15m
description: |
    'Detects threat from spam event thread protection logs.'
requiredDataConnectors:
- connectorId: MimecastSEGAPI
  dataTypes:
  - MimecastCG
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: gt
name: Mimecast Secure Email Gateway - Spam Event Thread
tactics:
- Discovery
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastSEG/MimecastCG_Spam_Event.yaml
triggerThreshold: 0
queryPeriod: 15m
enabled: true
status: Available
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    lookbackDuration: P7D
    enabled: true
    reopenClosedIncident: false
    matchingMethod: AllEntities

ARM