CYFIRMA - Customer Accounts Leaks Detection Rule | Microsoft Sentinel Analytic Rules

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Id	ebd1bf8d-aa18-4e66-9cad-555b71a290f1
Rulename	CYFIRMA - Customer Accounts Leaks Detection Rule
Description	“Detects recent leaks of customer account credentials based on CYFIRMA’s threat intelligence. This rule surfaces the latest credential exposures, including email, username, and breach metadata. It enables security teams to quickly identify and investigate leaked customer data from third-party breaches, dark web listings, or public repositories.”
Severity	High
Tactics	CredentialAccess InitialAccess
Techniques	T1552 T1078
Required data connectors	CyfirmaCompromisedAccountsDataConnector
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/Cyfirma%20Compromised%20Accounts/Analytic%20Rules/CustomerAccountsLeaksRule.yaml
Version	1.0.1
Arm template	ebd1bf8d-aa18-4e66-9cad-555b71a290f1.json

KQL

// Customer Accounts Leaks - Latest per UID
let timeFrame = 5m;
CyfirmaCompromisedAccounts_CL
| where TimeGenerated between (ago(timeFrame) .. now())
    and Category has "Customer Accounts Leaks"
| extend 
    ProviderName = 'CYFIRMA',
    ProductName = 'DeCYFIR/DeTCT'
| summarize arg_max(TimeGenerated, 
    user_name,
    email,
    url,
    password,
    breach_date,
    first_seen,
    last_seen,
    impact,
    recommendations,
    description,
    source,
    ProductName,
    ProviderName
) by uid
| sort by TimeGenerated desc

YAML

queryFrequency: 5m
entityMappings:
- fieldMappings:
  - columnName: user_name
    identifier: Name
  - columnName: email
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: url
    identifier: Url
  entityType: URL
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    enabled: false
    reopenClosedIncident: false
triggerThreshold: 0
suppressionEnabled: true
triggerOperator: gt
severity: High
suppressionDuration: 6h
eventGroupingSettings:
  aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Compromised%20Accounts/Analytic%20Rules/CustomerAccountsLeaksRule.yaml
alertDetailsOverride:
  alertDisplayNameFormat: Customer Leak - {{user_name}} - {{email}}
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDescriptionFormat: '{{description}}'
query: |
  // Customer Accounts Leaks - Latest per UID
  let timeFrame = 5m;
  CyfirmaCompromisedAccounts_CL
  | where TimeGenerated between (ago(timeFrame) .. now())
      and Category has "Customer Accounts Leaks"
  | extend 
      ProviderName = 'CYFIRMA',
      ProductName = 'DeCYFIR/DeTCT'
  | summarize arg_max(TimeGenerated, 
      user_name,
      email,
      url,
      password,
      breach_date,
      first_seen,
      last_seen,
      impact,
      recommendations,
      description,
      source,
      ProductName,
      ProviderName
  ) by uid
  | sort by TimeGenerated desc
tactics:
- CredentialAccess
- InitialAccess
queryPeriod: 5m
customDetails:
  Source: source
  TimeGenerated: TimeGenerated
  BreachDate: breach_date
  Impact: impact
  Recommendations: recommendations
  FirstSeen: first_seen
  UID: uid
  Description: description
  LastSeen: last_seen
relevantTechniques:
- T1552
- T1078
requiredDataConnectors:
- connectorId: CyfirmaCompromisedAccountsDataConnector
  dataTypes:
  - CyfirmaCompromisedAccounts_CL
id: ebd1bf8d-aa18-4e66-9cad-555b71a290f1
version: 1.0.1
description: |
  "Detects recent leaks of customer account credentials based on CYFIRMA's threat intelligence.
    This rule surfaces the latest credential exposures, including email, username, and breach metadata.
    It enables security teams to quickly identify and investigate leaked customer data from third-party breaches, dark web listings, or public repositories."
kind: Scheduled
name: CYFIRMA - Customer Accounts Leaks Detection Rule
status: Available

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/ebd1bf8d-aa18-4e66-9cad-555b71a290f1')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ebd1bf8d-aa18-4e66-9cad-555b71a290f1')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{description}}",
          "alertDisplayNameFormat": "Customer Leak - {{user_name}} - {{email}}",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "ebd1bf8d-aa18-4e66-9cad-555b71a290f1",
        "customDetails": {
          "BreachDate": "breach_date",
          "Description": "description",
          "FirstSeen": "first_seen",
          "Impact": "impact",
          "LastSeen": "last_seen",
          "Recommendations": "recommendations",
          "Source": "source",
          "TimeGenerated": "TimeGenerated",
          "UID": "uid"
        },
        "description": "\"Detects recent leaks of customer account credentials based on CYFIRMA's threat intelligence.\n  This rule surfaces the latest credential exposures, including email, username, and breach metadata.\n  It enables security teams to quickly identify and investigate leaked customer data from third-party breaches, dark web listings, or public repositories.\"\n",
        "displayName": "CYFIRMA - Customer Accounts Leaks Detection Rule",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "user_name",
                "identifier": "Name"
              },
              {
                "columnName": "email",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "url",
                "identifier": "Url"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Compromised%20Accounts/Analytic%20Rules/CustomerAccountsLeaksRule.yaml",
        "query": "// Customer Accounts Leaks - Latest per UID\nlet timeFrame = 5m;\nCyfirmaCompromisedAccounts_CL\n| where TimeGenerated between (ago(timeFrame) .. now())\n    and Category has \"Customer Accounts Leaks\"\n| extend \n    ProviderName = 'CYFIRMA',\n    ProductName = 'DeCYFIR/DeTCT'\n| summarize arg_max(TimeGenerated, \n    user_name,\n    email,\n    url,\n    password,\n    breach_date,\n    first_seen,\n    last_seen,\n    impact,\n    recommendations,\n    description,\n    source,\n    ProductName,\n    ProviderName\n) by uid\n| sort by TimeGenerated desc\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT6H",
        "suppressionEnabled": true,
        "tactics": [
          "CredentialAccess",
          "InitialAccess"
        ],
        "techniques": [
          "T1078",
          "T1552"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}