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API Reference: Splunk SPL Detection Rules

Splunk REST API - Saved Searches

POST /servicesNS/{owner}/{app}/saved/searches
Authorization: Bearer TOKEN
Field Description
name Saved search name
search SPL query string
is_scheduled 1 for scheduled
cron_schedule Cron expression (e.g., */5 * * * *)
dispatch.earliest_time Start of search window
alert.severity 1-5 (info to critical)
alert_type number of events
alert_threshold Trigger threshold

Key SPL Commands

Command Description
stats count by field Aggregate events
where count > N Filter results
table field1, field2 Select fields
eval Compute new fields
lookup Enrich from lookup table
tstats Accelerated data model search
join Join two datasets

Windows Event IDs for Detection

EventCode Source Description
4624 Security Successful logon
4625 Security Failed logon
4648 Security Explicit credential logon
4698 Security Scheduled task created
4104 PowerShell Script block logging
1 Sysmon Process creation
3 Sysmon Network connection
10 Sysmon Process access

Alert Severity Levels

Level Value Description
Info 1 Informational
Low 2 Low risk
Medium 3 Medium risk
High 4 High risk
Critical 5 Critical risk