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

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

ARM