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

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

ARM