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API - Rate limiting

Description

'42Crunch API protection against first-time access'
Rule type
Scheduled
Version
3.0.1
Declared status
Available
Query frequency
1d
Query period
7d
Trigger
gt 0

Declared MITRE coverage

Declared sources

Metadata from the source file. No dependencies inferred from KQL.

Connectors

Data types

KQL query

Original query, unchanged.

let firstRec = FortyTwoCrunchAPIProtection
| where TimeGenerated >= ago(5m) 
| project-away NonBlockingMode, SourcePort, DestinationPort, Query, ApiId, RequestHeader, ResponseHeader, Errors, EventType, Uuid
| where UriPath has "/api/login" |
top 1 by Timestamp desc;
let ipAddress = toscalar(firstRec | summarize by SourceIp);
let secondRec = FortyTwoCrunchAPIProtection
| where TimeGenerated >= ago(7d) 
| project-away NonBlockingMode, SourcePort, DestinationPort, Query, ApiId, RequestHeader, ResponseHeader, Errors, EventType, Uuid
| where UriPath has "/api/login" and SourceIp == ipAddress;
let recCount = iff((toscalar(secondRec | count) > 1), 0, 1);
secondRec | take recCount

Declared entities

IPHostAccount

Related content

Links established from declared identifiers and solution manifests.

Source provenance

GitHub

Displayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.

Source identifier
c6258d51-7b82-4942-8293-94c1dcf91595
Additional source files 2Solutions/42Crunch API Protection/Analytic Rules/APIFirstTimeAccess.yamlsource ↗Solutions/42Crunch API Protection/Data/Solution_42CrunchAPIProtection.jsonsolution-membership ↗
GSTEP / CATALOG TRACKING

Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC

GSTEP sync dates, separate from the source content’s publication dates.