Mimecast Secure Email Gateway - URL Protect

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Id	ea19dae6-bbb3-4444-a1b8-8e9ae6064aab
Rulename	Mimecast Secure Email Gateway - URL Protect
Description	Detect threat when potentially malicious url found
Severity	High
Tactics	InitialAccess Discovery Execution
Techniques	T1566
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_Url_Protect.yaml
Version	1.0.1
Arm template	ea19dae6-bbb3-4444-a1b8-8e9ae6064aab.json

KQL

MimecastSIEM_CL| where mimecastEventId_s=="mail_ttp_url" and reason_s != "clean"

YAML

incidentConfiguration:
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: 1d
  createIncident: true
relevantTechniques:
- T1566
queryFrequency: 5m
tactics:
- InitialAccess
- Discovery
- Execution
suppressionDuration: 5h
triggerOperator: gt
name: Mimecast Secure Email Gateway - URL Protect
description: Detect threat when potentially malicious url found
kind: Scheduled
entityMappings:
- entityType: MailMessage
  fieldMappings:
  - columnName: sender_s
    identifier: Sender
  - columnName: recipient_s
    identifier: Recipient
  - columnName: subject_s
    identifier: Subject
version: 1.0.1
eventGroupingSettings:
  aggregationKind: SingleAlert
id: ea19dae6-bbb3-4444-a1b8-8e9ae6064aab
suppressionEnabled: false
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastSIEM_Url_Protect.yaml
customDetails:
  action: action_s
  credentialTheft: credentialTheft_s
  urlCategory: urlCategory_s
  SourceIP: SourceIP
  reason: reason_s
  route: route_s
  MsgId_s: msgid_s
  url: url_s
  senderDomain: senderDomain_s
triggerThreshold: 0
queryPeriod: 15m
requiredDataConnectors:
- connectorId: MimecastSIEMAPI
  dataTypes:
  - MimecastSIEM_CL
severity: High
enabled: true
query: MimecastSIEM_CL| where mimecastEventId_s=="mail_ttp_url" and reason_s != "clean"

ARM