Microsoft Sentinel Analytic Rules
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  5. CYFIRMA - Customer Accounts Leaks Detection Rule

CYFIRMA - Customer Accounts Leaks Detection Rule

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Idebd1bf8d-aa18-4e66-9cad-555b71a290f1
RulenameCYFIRMA - 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.”
SeverityHigh
TacticsCredentialAccess
InitialAccess
TechniquesT1552
T1078
Required data connectorsCyfirmaCompromisedAccountsDataConnector
KindScheduled
Query frequency5m
Query period5m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Compromised Accounts/Analytic Rules/CustomerAccountsLeaksRule.yaml
Version1.0.1
Arm templateebd1bf8d-aa18-4e66-9cad-555b71a290f1.json
Deploy To Azure
// 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

name: CYFIRMA - Customer Accounts Leaks Detection Rule
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: Customer Leak - {{user_name}} - {{email}}
  alertDescriptionFormat: '{{description}}'
id: ebd1bf8d-aa18-4e66-9cad-555b71a290f1
triggerThreshold: 0
requiredDataConnectors:
- connectorId: CyfirmaCompromisedAccountsDataConnector
  dataTypes:
  - CyfirmaCompromisedAccounts_CL
kind: Scheduled
triggerOperator: gt
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."  
severity: High
relevantTechniques:
- T1552
- T1078
suppressionDuration: 6h
queryPeriod: 5m
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
tactics:
- CredentialAccess
- InitialAccess
customDetails:
  Source: source
  Description: description
  TimeGenerated: TimeGenerated
  BreachDate: breach_date
  FirstSeen: first_seen
  Recommendations: recommendations
  LastSeen: last_seen
  UID: uid
  Impact: impact
queryFrequency: 5m
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: user_name
  - identifier: UPNSuffix
    columnName: email
  entityType: Account
- fieldMappings:
  - identifier: Url
    columnName: url
  entityType: URL
status: Available
suppressionEnabled: true
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  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Compromised Accounts/Analytic Rules/CustomerAccountsLeaksRule.yaml

{
  "$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 Compromised Accounts/Analytic Rules/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"
    }
  ]
}