API - Password Cracking

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Id	d951d64d-0ecd-4675-8c79-6c870d5f72ac
Rulename	API - Password Cracking
Description	42Crunch API protection against password cracking
Severity	High
Tactics	CredentialAccess
Techniques	T1110 T1555 T1187
Required data connectors	42CrunchAPIProtection
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIPasswordCracking.yaml
Version	1.0.0
Arm template	d951d64d-0ecd-4675-8c79-6c870d5f72ac.json

KQL

let loginRec = apifirewall_log_1_CL
| where TimeGenerated >= ago(5m) 
| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
| where Instance_Name_s == "Instance_2" and URI_Path_s has "/api/login?user=" and Status_d == 403;
let recCount = iff((toscalar(loginRec | count) > 10), 1, 0);
loginRec | take recCount

YAML

customDetails: 
description: |
    '42Crunch API protection against password cracking'
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: SingleAlert
queryPeriod: 5m
triggerOperator: gt
kind: Scheduled
relevantTechniques:
- T1110
- T1555
- T1187
query: |
  let loginRec = apifirewall_log_1_CL
  | where TimeGenerated >= ago(5m) 
  | project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
  | where Instance_Name_s == "Instance_2" and URI_Path_s has "/api/login?user=" and Status_d == 403;
  let recCount = iff((toscalar(loginRec | count) > 10), 1, 0);
  loginRec | take recCount  
queryFrequency: 5m
requiredDataConnectors:
- connectorId: 42CrunchAPIProtection
  dataTypes:
  - apifirewall_log_1_CL
name: API - Password Cracking
severity: High
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: Source_IP_s
  entityType: IP
- fieldMappings:
  - identifier: HostName
    columnName: Hostname_s
  entityType: Host
- fieldMappings:
  - identifier: FullName
    columnName: Instance_Name_s
  entityType: Account
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIPasswordCracking.yaml
status: Available
id: d951d64d-0ecd-4675-8c79-6c870d5f72ac
tactics:
- CredentialAccess

ARM