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

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

ARM