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

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

ARM