CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule

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Id	e41b7640-9ba6-42d6-a4c9-1ab6932a0b14
Rulename	CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule
Description	“This KQL query identifies network-based indicators from CYFIRMA intelligence that are associated with the role ‘TOR’. These indicators may include IP addresses, domains, and URLs related to Tor network activity. Threat actors often use Tor for anonymous communication, command and control, data exfiltration, and evasion of network defenses.”
Severity	Medium
Tactics	CommandAndControl Exfiltration InitialAccess Persistence Reconnaissance
Techniques	T1090 T1572 T1048 T1071 T1189 T1505 T1595 T1090.003 T1048.002 T1071.001 T1505.003 T1595.002
Required data connectors	CyfirmaCyberIntelligenceDC
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/TORNodeNetworkIndicatorsMonitorMediumSeverityRule.yaml
Version	1.0.1
Arm template	e41b7640-9ba6-42d6-a4c9-1ab6932a0b14.json

KQL

//TOR Node Network Indicators - Monitor Recommended 
let timeFrame= 5m;
CyfirmaIndicators_CL 
| where (ConfidenceScore < 80 and ConfidenceScore >= 50)
    and TimeGenerated between (ago(timeFrame) .. now())
    and pattern !contains 'file:hashes' and RecommendedActions has 'Monitor' and Roles has 'TOR'
| extend IPv4 = extract(@"ipv4-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend IPv6 = extract(@"ipv6-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend URL = extract(@"url:value\s*=\s*'([^']+)'", 1, pattern)
| extend Domain = extract(@"domain-name:value\s*=\s*'([^']+)'", 1, pattern)
| extend parsed = parse_json(extensions)
| extend extensionKeys = bag_keys(parsed)
| mv-expand extensionKeys
| extend extensionKeyStr = tostring(extensionKeys)
| extend ext = parsed[extensionKeyStr]
| extend props = ext.properties
| extend 
    extension_id = extensionKeyStr,
    ASN_Owner = props.asn_owner,
    ASN = props.asn,
    ProviderName = 'CYFIRMA',
    ProductName = 'DeCYFIR/DeTCT'
| project
    IPv4,
    IPv6,
    URL,
    Domain,
    ThreatActors,
    RecommendedActions,
    Sources,
    Roles,
    Country,
    IPAbuse,
    name,
    Description,
    ConfidenceScore,
    IndicatorID,
    created,
    modified,
    valid_from,
    Tags,
    ThreatType,
    TimeGenerated,
    SecurityVendors,
    ProductName,
    ProviderName

YAML

description: |
  "This KQL query identifies network-based indicators from CYFIRMA intelligence that are associated with the role 'TOR'. 
  These indicators may include IP addresses, domains, and URLs related to Tor network activity. 
  Threat actors often use Tor for anonymous communication, command and control, data exfiltration, and evasion of network defenses."  
tactics:
- CommandAndControl
- Exfiltration
- InitialAccess
- Persistence
- Reconnaissance
suppressionEnabled: true
suppressionDuration: 5m
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
alertDetailsOverride:
  alertDisplayNameFormat: 'High-Confidence TOR Node Network Indicators - Monitor Recommended - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
  createIncident: true
id: e41b7640-9ba6-42d6-a4c9-1ab6932a0b14
severity: Medium
eventGroupingSettings:
  aggregationKind: AlertPerResult
customDetails:
  Tags: Tags
  TimeGenerated: TimeGenerated
  SecurityVendors: SecurityVendors
  Country: Country
  ThreatActors: ThreatActors
  Roles: Roles
  ThreatType: ThreatType
  ValidFrom: valid_from
  IndicatorID: IndicatorID
  RecommendedActions: RecommendedActions
  Sources: Sources
  Description: Description
  IPAbuse: IPAbuse
  ConfidenceScore: ConfidenceScore
  Created: created
  Modified: modified
query: |
  //TOR Node Network Indicators - Monitor Recommended 
  let timeFrame= 5m;
  CyfirmaIndicators_CL 
  | where (ConfidenceScore < 80 and ConfidenceScore >= 50)
      and TimeGenerated between (ago(timeFrame) .. now())
      and pattern !contains 'file:hashes' and RecommendedActions has 'Monitor' and Roles has 'TOR'
  | extend IPv4 = extract(@"ipv4-addr:value\s*=\s*'([^']+)'", 1, pattern)
  | extend IPv6 = extract(@"ipv6-addr:value\s*=\s*'([^']+)'", 1, pattern)
  | extend URL = extract(@"url:value\s*=\s*'([^']+)'", 1, pattern)
  | extend Domain = extract(@"domain-name:value\s*=\s*'([^']+)'", 1, pattern)
  | extend parsed = parse_json(extensions)
  | extend extensionKeys = bag_keys(parsed)
  | mv-expand extensionKeys
  | extend extensionKeyStr = tostring(extensionKeys)
  | extend ext = parsed[extensionKeyStr]
  | extend props = ext.properties
  | extend 
      extension_id = extensionKeyStr,
      ASN_Owner = props.asn_owner,
      ASN = props.asn,
      ProviderName = 'CYFIRMA',
      ProductName = 'DeCYFIR/DeTCT'
  | project
      IPv4,
      IPv6,
      URL,
      Domain,
      ThreatActors,
      RecommendedActions,
      Sources,
      Roles,
      Country,
      IPAbuse,
      name,
      Description,
      ConfidenceScore,
      IndicatorID,
      created,
      modified,
      valid_from,
      Tags,
      ThreatType,
      TimeGenerated,
      SecurityVendors,
      ProductName,
      ProviderName  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/TORNodeNetworkIndicatorsMonitorMediumSeverityRule.yaml
kind: Scheduled
queryPeriod: 5m
enabled: false
name: CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule
queryFrequency: 5m
triggerThreshold: 0
relevantTechniques:
- T1090
- T1572
- T1048
- T1071
- T1189
- T1505
- T1595
- T1090.003
- T1048.002
- T1071.001
- T1505.003
- T1595.002
version: 1.0.1
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPv4
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPv6
- entityType: DNS
  fieldMappings:
  - identifier: DomainName
    columnName: Domain
- entityType: URL
  fieldMappings:
  - identifier: Url
    columnName: URL
triggerOperator: GreaterThan

ARM