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

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Id	ed1aabc1-e1c1-42f4-abac-fd5637730f13
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	High
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/DBWMRansomwareExposureDetectedHighRule.yaml
Version	1.0.1
Arm template	ed1aabc1-e1c1-42f4-abac-fd5637730f13.json

KQL

// High severity - Data Breach and Web Monitoring - Ransomware Exposure Detected
let timeFrame = 5m;
CyfirmaDBWMRansomwareAlerts_CL
| where severity == 'Critical' 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

name: CYFIRMA - Data Breach and Web Monitoring - Ransomware Exposure Detected Rule
severity: High
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."  
version: 1.0.1
customDetails:
  LastSeen: LastSeen
  FirstSeen: FirstSeen
  Description: Description
  RiskScore: RiskScore
  TimeGenerated: TimeGenerated
  Impact: Impact
  Source: Source
  UID: UID
  AssetType: AssetType
  AssetValue: AssetValue
  Recommendation: Recommendation
  AlertUID: AlertUID
  ThreatActors: ThreatActors
requiredDataConnectors:
- dataTypes:
  - CyfirmaDBWMRansomwareAlerts_CL
  connectorId: CyfirmaDigitalRiskAlertsConnector
tactics:
- InitialAccess
- Exfiltration
relevantTechniques:
- T1566.001
- T1566.002
- T1566.003
kind: Scheduled
triggerThreshold: 0
status: Available
queryPeriod: 5m
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    enabled: false
  createIncident: true
alertDetailsOverride:
  alertDescriptionFormat: '{{Description}} '
  alertDisplayNameFormat: 'CYFIRMA - High Severity Alert: Ransomware Exposure Detected - {{AlertTitle}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
triggerOperator: gt
query: |
  // High severity - Data Breach and Web Monitoring - Ransomware Exposure Detected
  let timeFrame = 5m;
  CyfirmaDBWMRansomwareAlerts_CL
  | where severity == 'Critical' 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  
eventGroupingSettings:
  aggregationKind: AlertPerResult
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Digital Risk/Analytic Rules/DBWMRansomwareExposureDetectedHighRule.yaml
id: ed1aabc1-e1c1-42f4-abac-fd5637730f13

ARM