Detection rules › Kusto
Mimecast Audit - Logon Authentication Failed
Detects threat when logon authentication failure found in audit
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access |
Rule body
id: f00197ab-491f-41e7-9e22-a7003a4c1e54
name: Mimecast Audit - Logon Authentication Failed
description: Detects threat when logon authentication failure found in audit
displayName: Mimecast Audit - Logon Authentication Failed
severity: High
requiredDataConnectors:
- connectorId: MimecastAuditAPI
dataTypes:
- MimecastAudit
enabled: true
query: |
MimecastAudit
| where ['Source IP'] !="" and ['Audit Type'] == "Logon Authentication Failed"
| extend SourceIp = ['Source IP']
queryFrequency: 30m
queryPeriod: 30m
triggerOperator: gt
triggerThreshold: 3
suppressionDuration: 5h
suppressionEnabled: false
tactics:
- Discovery
- InitialAccess
- CredentialAccess
relevantTechniques:
- T1110
alertRuleTemplateName:
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: true
reopenClosedIncident: false
lookbackDuration: P7D
matchingMethod: AllEntities
eventGroupingSettings:
aggregationKind: SingleAlert
alertDetailsOverride:
customDetails:
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: SourceIp
- entityType: Mailbox
fieldMappings:
- identifier: MailboxPrimaryAddress
columnName: User
- entityType: CloudApplication
fieldMappings:
- identifier: AppId
columnName: Application
version: 1.0.1
kind: Scheduled
Stages and Predicates
Stage 1: source
MimecastAudit
Stage 2: where
| where ['Source IP'] !="" and ['Audit Type'] == "Logon Authentication Failed"
Stage 3: extend
| extend SourceIp = ['Source IP']
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Audit Type | eq |
| field:"Audit Type" kind:eq value:"Logon Authentication Failed" |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
SourceIp | extend |