Mimecast Secure Email Gateway - URL Protect

Back


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

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

ARM