Detection rules › Kusto
Cisco Duo - Multiple user login failures
'Detects when multiple user login failures occurs.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access |
Rule body
id: 034f62b6-df51-49f3-831f-1e4cfd3c40d2
name: Cisco Duo - Multiple user login failures
description: |
'Detects when multiple user login failures occurs.'
severity: High
status: Available
requiredDataConnectors:
- connectorId: CiscoDuoAuthConnectorDefinition
dataTypes:
- DuoAuthentication_CL
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
relevantTechniques:
- T1078
query: |
let threshold = 10;
DuoAuthentication_CL
| where Result in~ ('denied', 'failure')
| summarize count() by UserName, bin(TimeGenerated, 10m)
| where count_ > threshold
| extend AccountCustomEntity = UserName
entityMappings:
- entityType: Account
fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
version: 1.0.2
kind: Scheduled
Stages and Predicates
Parameters
let threshold = 10;
Stage 1: source
DuoAuthentication_CL
Stage 2: where
| where Result in~ ('denied', 'failure')
Stage 3: summarize
| summarize count() by UserName, bin(TimeGenerated, 10m)
Stage 4: where
| where count_ > threshold
Stage 5: extend
| extend AccountCustomEntity = UserName
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Result | in |
| field:"Result" kind:in |
count_ | gt |
| field:"count_" kind:gt value:"10" |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
UserName | summarize |
AccountCustomEntity | extend |