Mimecast Audit - Logon Authentication Failed

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Id	f00197ab-491f-41e7-9e22-a7003a4c1e54
Rulename	Mimecast Audit - Logon Authentication Failed
Description	Detects threat when logon authentication failure found in audit
Severity	High
Tactics	Discovery InitialAccess CredentialAccess
Techniques	T1110
Required data connectors	MimecastAuditAPI
Kind	Scheduled
Query frequency	30m
Query period	30m
Trigger threshold	3
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastAudit/Mimecast_Audit.yaml
Version	1.0.1
Arm template	f00197ab-491f-41e7-9e22-a7003a4c1e54.json

KQL

MimecastAudit 
| where ['Source IP'] !="" and ['Audit Type'] == "Logon Authentication Failed"
| extend   SourceIp = ['Source IP']

YAML

eventGroupingSettings:
  aggregationKind: SingleAlert
requiredDataConnectors:
- connectorId: MimecastAuditAPI
  dataTypes:
  - MimecastAudit
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastAudit/Mimecast_Audit.yaml
triggerThreshold: 3
description: Detects threat when logon authentication failure found in audit
enabled: true
alertRuleTemplateName: 
relevantTechniques:
- T1110
queryPeriod: 30m
displayName: Mimecast Audit - Logon Authentication Failed
name: Mimecast Audit - Logon Authentication Failed
suppressionEnabled: false
alertDetailsOverride: 
suppressionDuration: 5h
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: SourceIp
    identifier: Address
- entityType: Mailbox
  fieldMappings:
  - columnName: User
    identifier: MailboxPrimaryAddress
- entityType: CloudApplication
  fieldMappings:
  - columnName: Application
    identifier: AppId
queryFrequency: 30m
triggerOperator: gt
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    matchingMethod: AllEntities
    lookbackDuration: P7D
    enabled: true
    reopenClosedIncident: false
customDetails: 
tactics:
- Discovery
- InitialAccess
- CredentialAccess
severity: High
version: 1.0.1
query: |
  MimecastAudit 
  | where ['Source IP'] !="" and ['Audit Type'] == "Logon Authentication Failed"
  | extend   SourceIp = ['Source IP']   
id: f00197ab-491f-41e7-9e22-a7003a4c1e54

ARM