Detection rules › Kusto
Multiple failed attempts of NetBackup login
This is a third-party alert feed, not a detection over modeled telemetry. The vendor product raised the finding; this rule forwards it into the SIEM. It is searchable for reference but is excluded from the detection-rule browse and the ATT&CK coverage matrix.
This rule generates an incident when there are more than 5 failed login attemts for a given host in the last 15 minutes.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | T1110 Brute Force, T1212 Exploitation for Credential Access |
Rule body kusto
id: d39f0c47-2e85-49b9-a686-388c2eb7062c
name: Multiple failed attempts of NetBackup login
description: This rule generates an incident when there are more than 5 failed login attemts for a given host in the last 15 minutes.
severity: Medium
status: Available
requiredDataConnectors: []
queryFrequency: 15m
queryPeriod: 15m
triggerOperator: gt
triggerThreshold: 0
tactics:
- CredentialAccess
- Discovery
relevantTechniques:
- T1110
- T1212
query: "NetBackupAlerts_CL\r\n| where operation_s contains \"LOGIN\" and Message\
\ contains \"authentication failed\" \r\n| extend userName = split(userName_s,\
\ \"@\")[0]\r\n| extend host = split(userName_s, \"@\")[1] \r\n| summarize Total=count()\
\ by tostring(host)\r\n| where Total >= 5"
entityMappings:
- entityType: Host
fieldMappings:
- identifier: HostName
columnName: host
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: false
reopenClosedIncident: false
lookbackDuration: 5h
matchingMethod: AllEntities
suppressionDuration: PT5H
suppressionEnabled: false
eventGroupingSettings:
aggregationKind: SingleAlert
version: 1.0.0
kind: Scheduled
Stages and Predicates
Stage 1: source
NetBackupAlerts_CL
Stage 2: where
| where operation_s contains "LOGIN" and Message contains "authentication failed"
Stage 3: extend
| extend userName = split(userName_s, "@")[0]
Stage 4: extend
| extend host = split(userName_s, "@")[1]
Stage 5: summarize
| summarize Total=count() by tostring(host)
Stage 6: where
| where Total >= 5
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Message | contains |
|
Total | ge |
|
operation_s | contains |
|
Output fields
Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.
| Field | Source |
|---|---|
Total | summarize |