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Detection rules › Kusto

Flare leaked credentials results

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.

Status
available
Severity
medium
Time window
1h
Source
github.com/Azure/Azure-Sentinel

'This query searches for leaked credential events.'

MITRE ATT&CK coverage

TacticTechniques
Credential AccessT1110 Brute Force

Rule body kusto

id: 9cb7c337-f170-4af6-b0e8-b6b7552d762d
name: Flare leaked credentials results
description: |
    'This query searches for leaked credential events.'
severity: Medium
status: Available
requiredDataConnectors:
  - connectorId: Flare
    dataTypes:
      - FireworkV2_CL
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - CredentialAccess
relevantTechniques:
  - T1110
query: |
  FireworkV2_CL
  | where notempty(uid) and RiskScore >= 3
  | extend index_name = split(uid, "/")[0]
  | where index_name == "leaked_credential"
version: 3.0.0
kind: Scheduled

Stages and Predicates

Stage 1: source

FireworkV2_CL

Stage 2: where

| where notempty(uid) and RiskScore >= 3

Stage 3: extend

| extend index_name = split(uid, "/")[0]

Stage 4: where

| where index_name == "leaked_credential"

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.

FieldKindValues
RiskScorege
  • 3 transforms: cased
index_nameeq
  • leaked_credential transforms: cased
uidis_not_null
  • (no value, null check)

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.

FieldSource
index_nameextend