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

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

ARM