AR Microsoft Sentinel Analytic Rules ONLINE

Analytic rule catalog

CYFIRMA - Data Breach and Web Monitoring - Ransomware Exposure Detected Rule

Back
Idd5f9a6fe-7fd2-488c-8690-0ca24fba43dc
RulenameCYFIRMA - Data Breach and Web Monitoring - Ransomware Exposure Detected Rule
Description“This analytics rule detects high-severity ransomware threats targeting the organization, as reported by CYFIRMA’s Dark Web and Data Breach Intelligence feeds.

The alert is generated when threat actors post, claim, or associate ransomware activity with corporate domains, brands, or subsidiaries, indicating a potential data breach, extortion attempt, or unauthorized access.”
SeverityMedium
TacticsInitialAccess
Exfiltration
TechniquesT1566.001
T1566.002
T1566.003
Required data connectorsCyfirmaDigitalRiskAlertsConnector
KindScheduled
Query frequency5m
Query period5m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Digital%20Risk/Analytic%20Rules/DBWMRansomwareExposureDetectedMediumRule.yaml
Version1.0.1
Arm templated5f9a6fe-7fd2-488c-8690-0ca24fba43dc.json
Deploy To Azure
// Medium severity - Data Breach and Web Monitoring - Ransomware Exposure Detected
let timeFrame = 5m;
CyfirmaDBWMRansomwareAlerts_CL
| where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())
| extend
    Description=description,
    FirstSeen=first_seen,
    LastSeen=last_seen,
    RiskScore=risk_score,
    AlertUID=alert_uid,
    UID=uid,
    AssetType=asset_type,
    AssetValue=signature,
    Source=source,
    Impact=impact,
    Recommendation='',
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT',
    AlertTitle=Alert_title,
    ThreatActors= threat_actors
| project
    TimeGenerated,
    Description,
    RiskScore,
    FirstSeen,
    LastSeen,
    AlertUID,
    UID,
    AssetType,
    AssetValue,
    Source,
    Impact,
    Recommendation,
    ProductName,
    ProviderName,
    AlertTitle,
    ThreatActors

incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    enabled: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
  createIncident: true
triggerOperator: gt
id: d5f9a6fe-7fd2-488c-8690-0ca24fba43dc
query: |
  // Medium severity - Data Breach and Web Monitoring - Ransomware Exposure Detected
  let timeFrame = 5m;
  CyfirmaDBWMRansomwareAlerts_CL
  | where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())
  | extend
      Description=description,
      FirstSeen=first_seen,
      LastSeen=last_seen,
      RiskScore=risk_score,
      AlertUID=alert_uid,
      UID=uid,
      AssetType=asset_type,
      AssetValue=signature,
      Source=source,
      Impact=impact,
      Recommendation='',
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT',
      AlertTitle=Alert_title,
      ThreatActors= threat_actors
  | project
      TimeGenerated,
      Description,
      RiskScore,
      FirstSeen,
      LastSeen,
      AlertUID,
      UID,
      AssetType,
      AssetValue,
      Source,
      Impact,
      Recommendation,
      ProductName,
      ProviderName,
      AlertTitle,
      ThreatActors
triggerThreshold: 0
version: 1.0.1
name: CYFIRMA - Data Breach and Web Monitoring - Ransomware Exposure Detected Rule
status: Available
customDetails:
  AssetValue: AssetValue
  Impact: Impact
  AlertUID: AlertUID
  RiskScore: RiskScore
  TimeGenerated: TimeGenerated
  AssetType: AssetType
  UID: UID
  FirstSeen: FirstSeen
  Description: Description
  LastSeen: LastSeen
  Source: Source
  Recommendation: Recommendation
  ThreatActors: ThreatActors
queryFrequency: 5m
description: |
  "This analytics rule detects high-severity ransomware threats targeting the organization, as reported by CYFIRMA's Dark Web and Data Breach Intelligence feeds. 
  The alert is generated when threat actors post, claim, or associate ransomware activity with corporate domains, brands, or subsidiaries, indicating a potential data breach, extortion attempt, or unauthorized access."
severity: Medium
alertDetailsOverride:
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
  alertDescriptionFormat: '{{Description}} '
  alertDisplayNameFormat: 'CYFIRMA - Medium Severity Alert: Ransomware Exposure Detected - {{AlertTitle}} '
kind: Scheduled
requiredDataConnectors:
- connectorId: CyfirmaDigitalRiskAlertsConnector
  dataTypes:
  - CyfirmaDBWMRansomwareAlerts_CL
eventGroupingSettings:
  aggregationKind: AlertPerResult
relevantTechniques:
- T1566.001
- T1566.002
- T1566.003
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Digital%20Risk/Analytic%20Rules/DBWMRansomwareExposureDetectedMediumRule.yaml
tactics:
- InitialAccess
- Exfiltration
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/d5f9a6fe-7fd2-488c-8690-0ca24fba43dc')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d5f9a6fe-7fd2-488c-8690-0ca24fba43dc')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "CYFIRMA - Medium Severity Alert: Ransomware Exposure Detected - {{AlertTitle}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "d5f9a6fe-7fd2-488c-8690-0ca24fba43dc",
        "customDetails": {
          "AlertUID": "AlertUID",
          "AssetType": "AssetType",
          "AssetValue": "AssetValue",
          "Description": "Description",
          "FirstSeen": "FirstSeen",
          "Impact": "Impact",
          "LastSeen": "LastSeen",
          "Recommendation": "Recommendation",
          "RiskScore": "RiskScore",
          "Source": "Source",
          "ThreatActors": "ThreatActors",
          "TimeGenerated": "TimeGenerated",
          "UID": "UID"
        },
        "description": "\"This analytics rule detects high-severity ransomware threats targeting the organization, as reported by CYFIRMA's Dark Web and Data Breach Intelligence feeds. \nThe alert is generated when threat actors post, claim, or associate ransomware activity with corporate domains, brands, or subsidiaries, indicating a potential data breach, extortion attempt, or unauthorized access.\"\n",
        "displayName": "CYFIRMA - Data Breach and Web Monitoring - Ransomware Exposure Detected Rule",
        "enabled": true,
        "entityMappings": null,
        "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%20Digital%20Risk/Analytic%20Rules/DBWMRansomwareExposureDetectedMediumRule.yaml",
        "query": "// Medium severity - Data Breach and Web Monitoring - Ransomware Exposure Detected\nlet timeFrame = 5m;\nCyfirmaDBWMRansomwareAlerts_CL\n| where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())\n| extend\n    Description=description,\n    FirstSeen=first_seen,\n    LastSeen=last_seen,\n    RiskScore=risk_score,\n    AlertUID=alert_uid,\n    UID=uid,\n    AssetType=asset_type,\n    AssetValue=signature,\n    Source=source,\n    Impact=impact,\n    Recommendation='',\n    ProviderName='CYFIRMA',\n    ProductName='DeCYFIR/DeTCT',\n    AlertTitle=Alert_title,\n    ThreatActors= threat_actors\n| project\n    TimeGenerated,\n    Description,\n    RiskScore,\n    FirstSeen,\n    LastSeen,\n    AlertUID,\n    UID,\n    AssetType,\n    AssetValue,\n    Source,\n    Impact,\n    Recommendation,\n    ProductName,\n    ProviderName,\n    AlertTitle,\n    ThreatActors\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1566.001",
          "T1566.002",
          "T1566.003"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration",
          "InitialAccess"
        ],
        "techniques": [
          "T1566"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}