Mimecast Audit - Logon Authentication Failed

Back


Id	9c5dcd76-9f6d-42a3-b984-314b52678f20
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	5m
Query period	15m
Trigger threshold	3
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastAudit/Analytic Rules/MimecastAudit.yaml
Version	1.0.0
Arm template	9c5dcd76-9f6d-42a3-b984-314b52678f20.json

KQL

MimecastAudit_CL | where src_s !="" and auditType_s == "Logon Authentication Failed"

YAML

apiVersion: 2021-09-01-preview
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastAudit/Analytic Rules/MimecastAudit.yaml
suppressionEnabled: false
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: src_s
- entityType: Mailbox
  fieldMappings:
  - identifier: MailboxPrimaryAddress
    columnName: user_s
- entityType: CloudApplication
  fieldMappings:
  - identifier: AppId
    columnName: app_s
description: Detects threat when logon authentication failure found in audit
enabled: true
queryFrequency: 5m
triggerThreshold: 3
relevantTechniques:
- T1110
tactics:
- Discovery
- InitialAccess
- CredentialAccess
queryPeriod: 15m
id: 9c5dcd76-9f6d-42a3-b984-314b52678f20
requiredDataConnectors:
- dataTypes:
  - MimecastAudit_CL
  connectorId: MimecastAuditAPI
customDetails: 
kind: Scheduled
suppressionDuration: 5h
severity: High
triggerOperator: gt
query: MimecastAudit_CL | where src_s !="" and auditType_s == "Logon Authentication Failed"
alertDetailsOverride: 
alertRuleTemplateName: 
eventGroupingSettings:
  aggregationKind: SingleAlert
displayName: Mimecast Audit - Logon Authentication Failed
incidentConfiguration:
  groupingConfiguration:
    enabled: true
    matchingMethod: AllEntities
    lookbackDuration: 1d
    reopenClosedIncident: false
  createIncident: true
version: 1.0.0
name: Mimecast Audit - Logon Authentication Failed

ARM