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

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Id	d5f9a6fe-7fd2-488c-8690-0ca24fba43dc
Rulename	CYFIRMA - 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.”
Severity	Medium
Tactics	InitialAccess Exfiltration
Techniques	T1566.001 T1566.002 T1566.003
Required data connectors	CyfirmaDigitalRiskAlertsConnector
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 Digital Risk/Analytic Rules/DBWMRansomwareExposureDetectedMediumRule.yaml
Version	1.0.1
Arm template	d5f9a6fe-7fd2-488c-8690-0ca24fba43dc.json

KQL

// 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

YAML

queryPeriod: 5m
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  
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: false
  createIncident: true
name: CYFIRMA - Data Breach and Web Monitoring - Ransomware Exposure Detected Rule
eventGroupingSettings:
  aggregationKind: AlertPerResult
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Digital Risk/Analytic Rules/DBWMRansomwareExposureDetectedMediumRule.yaml
alertDetailsOverride:
  alertDisplayNameFormat: 'CYFIRMA - Medium Severity Alert: Ransomware Exposure Detected - {{AlertTitle}} '
  alertDescriptionFormat: '{{Description}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
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."  
kind: Scheduled
version: 1.0.1
status: Available
severity: Medium
requiredDataConnectors:
- connectorId: CyfirmaDigitalRiskAlertsConnector
  dataTypes:
  - CyfirmaDBWMRansomwareAlerts_CL
triggerOperator: gt
triggerThreshold: 0
customDetails:
  Impact: Impact
  TimeGenerated: TimeGenerated
  UID: UID
  AssetType: AssetType
  LastSeen: LastSeen
  Description: Description
  AlertUID: AlertUID
  FirstSeen: FirstSeen
  Recommendation: Recommendation
  ThreatActors: ThreatActors
  AssetValue: AssetValue
  RiskScore: RiskScore
  Source: Source
tactics:
- InitialAccess
- Exfiltration
id: d5f9a6fe-7fd2-488c-8690-0ca24fba43dc
relevantTechniques:
- T1566.001
- T1566.002
- T1566.003

ARM