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

kind: Scheduled
customDetails:
  UID: uid
  Description: description
  BreachDate: breach_date
  TimeGenerated: TimeGenerated
  Impact: impact
  FirstSeen: first_seen
  Recommendations: recommendations
  Source: source
  LastSeen: last_seen
suppressionDuration: 6h
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: user_name
    identifier: Name
  - columnName: email
    identifier: UPNSuffix
- entityType: URL
  fieldMappings:
  - columnName: url
    identifier: Url
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
queryFrequency: 5m
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    enabled: false
  createIncident: true
triggerThreshold: 0
relevantTechniques:
- T1552
- T1078
eventGroupingSettings:
  aggregationKind: AlertPerResult
suppressionEnabled: true
status: Available
version: 1.0.1
name: CYFIRMA - Customer Accounts Leaks Detection Rule
id: ebd1bf8d-aa18-4e66-9cad-555b71a290f1
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  
requiredDataConnectors:
- dataTypes:
  - CyfirmaCompromisedAccounts_CL
  connectorId: CyfirmaCompromisedAccountsDataConnector
tactics:
- CredentialAccess
- InitialAccess
alertDetailsOverride:
  alertDisplayNameFormat: Customer Leak - {{user_name}} - {{email}}
  alertDescriptionFormat: '{{description}}'
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Compromised Accounts/Analytic Rules/CustomerAccountsLeaksRule.yaml
queryPeriod: 5m

{
  "$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"
    }
  ]
}