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

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Id	aba36dc3-af43-4ab6-9349-3d1e37f1d4f3
Rulename	CYFIRMA - Medium severity TOR Node Network Indicators - Block 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/TORNodeNetworkIndicatorsBlockMediumSeverityRule.yaml
Version	1.0.1
Arm template	aba36dc3-af43-4ab6-9349-3d1e37f1d4f3.json

KQL

//TOR Node Network Indicators - Block 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 'Block' 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

severity: Medium
query: |
  //TOR Node Network Indicators - Block 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 'Block' 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  
queryPeriod: 5m
suppressionEnabled: true
alertDetailsOverride:
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: 'High-Confidence TOR Node Network Indicators - Block Recommended - {{name}} '
kind: Scheduled
eventGroupingSettings:
  aggregationKind: AlertPerResult
relevantTechniques:
- T1090
- T1572
- T1048
- T1071
- T1189
- T1505
- T1595
- T1090.003
- T1048.002
- T1071.001
- T1505.003
- T1595.002
tactics:
- CommandAndControl
- Exfiltration
- InitialAccess
- Persistence
- Reconnaissance
triggerOperator: GreaterThan
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/TORNodeNetworkIndicatorsBlockMediumSeverityRule.yaml
entityMappings:
- fieldMappings:
  - columnName: IPv4
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: IPv6
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: Domain
    identifier: DomainName
  entityType: DNS
- fieldMappings:
  - columnName: URL
    identifier: Url
  entityType: URL
enabled: false
suppressionDuration: 5m
name: CYFIRMA - Medium severity TOR Node Network Indicators - Block Recommended Rule
triggerThreshold: 0
version: 1.0.1
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    reopenClosedIncident: false
    enabled: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
id: aba36dc3-af43-4ab6-9349-3d1e37f1d4f3
customDetails:
  Roles: Roles
  ValidFrom: valid_from
  Sources: Sources
  Country: Country
  RecommendedActions: RecommendedActions
  ThreatType: ThreatType
  ThreatActors: ThreatActors
  Tags: Tags
  IPAbuse: IPAbuse
  ConfidenceScore: ConfidenceScore
  TimeGenerated: TimeGenerated
  Modified: modified
  Created: created
  SecurityVendors: SecurityVendors
  IndicatorID: IndicatorID
  Description: Description
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."  
requiredDataConnectors:
- connectorId: CyfirmaCyberIntelligenceDC
  dataTypes:
  - CyfirmaIndicators_CL

ARM