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

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

ARM