Detection rules › Kusto
Versasec CMS - Multiple Failed Login Attempts
Detects when Operator login failed to often.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access |
Rule body
id: B1DB8B7E-9D74-48C3-9683-74483CBEFF4E
name: Versasec CMS - Multiple Failed Login Attempts
description: |
Detects when Operator login failed to often.
severity: High
status: Available
requiredDataConnectors:
- connectorId: VersasecCms
dataTypes:
- VersasecCmsSysLogs
queryFrequency: 5m
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 5
tactics:
- CredentialAccess
relevantTechniques:
- T1110 # Brute Force
query: |
let threshold = 5;
VersasecCmsSysLogs
| where EventId == 2
| sort by ComputerName asc, TimeGenerated asc
| extend TimeDiff = datetime_diff('minute', TimeGenerated, prev(TimeGenerated))
| where TimeDiff <= threshold and ComputerName == prev(ComputerName)
entityMappings:
- entityType: Host
fieldMappings:
- identifier: FullName
columnName: ComputerName
eventGroupingSettings:
aggregationKind: SingleAlert
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: false
reopenClosedIncident: false
lookbackDuration: 5m
matchingMethod: AllEntities
version: 1.0.1
kind: Scheduled
Stages and Predicates
Parameters
let threshold = 5;
Stage 1: source
VersasecCmsSysLogs
Stage 2: where
| where EventId == 2
Stage 3: sort
| sort by ComputerName asc, TimeGenerated asc
Stage 4: extend
| extend TimeDiff = datetime_diff('minute', TimeGenerated, prev(TimeGenerated))
Stage 5: where
| where TimeDiff <= threshold and ComputerName == prev(ComputerName)
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
EventId | eq |
| field:"EventId" kind:eq value:"2" |
TimeDiff | le |
| field:"TimeDiff" kind:le value:"5" |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
TimeDiff | extend |