Mimecast Secure Email Gateway - Spam Event Thread

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Id	df1b9377-5c29-4928-872f-9934a6b4f611
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	MimecastSIEMAPI
Kind	Scheduled
Query frequency	5m
Query period	15m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastSIEM_Spam_Event.yaml
Version	1.0.1
Arm template	df1b9377-5c29-4928-872f-9934a6b4f611.json

KQL

MimecastSIEM_CL| where mimecastEventId_s=="mail_spameventthread"

YAML

requiredDataConnectors:
- connectorId: MimecastSIEMAPI
  dataTypes:
  - MimecastSIEM_CL
relevantTechniques:
- T1083
name: Mimecast Secure Email Gateway - Spam Event Thread
queryFrequency: 5m
tactics:
- Discovery
triggerThreshold: 0
severity: Low
query: MimecastSIEM_CL| where mimecastEventId_s=="mail_spameventthread"
suppressionDuration: 5h
eventGroupingSettings:
  aggregationKind: SingleAlert
version: 1.0.1
kind: Scheduled
entityMappings:
- fieldMappings:
  - columnName: Sender_s
    identifier: Sender
  - columnName: Recipient_s
    identifier: Recipient
  - columnName: Subject_s
    identifier: Subject
  entityType: MailMessage
queryPeriod: 15m
triggerOperator: gt
customDetails:
  MsgId_s: MsgId_s
  SenderDomain: SenderDomain_s
  SourceIP: SourceIP
  headerFrom: headerFrom_s
  Route: Route_s
suppressionEnabled: false
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    enabled: true
    lookbackDuration: 1d
    matchingMethod: AllEntities
  createIncident: true
id: df1b9377-5c29-4928-872f-9934a6b4f611
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastSIEM_Spam_Event.yaml
enabled: true
description: Detects threat from spam event thread protection logs

ARM