CYFIRMA - Medium severity Malicious Network Indicators with Block Action Rule

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Id	4e7d1851-5aab-478d-b348-4b83dc2b03d9
Rulename	CYFIRMA - Medium severity Malicious Network Indicators with Block Action Rule
Description	“This rule detects network-based indicators such as IP addresses, domains, and URLs reported by CYFIRMA threat intelligence with a recommended action of ‘Block’ and no specified role. These indicators may be associated with infrastructure used in phishing campaigns, malware, or initial access via watering hole or drive-by compromise techniques.”
Severity	Medium
Tactics	InitialAccess Execution Reconnaissance Impact
Techniques	T1566 T1189 T1204 T1595 T1498 T1566.002 T1204.001 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/NetworkIndicatorsBlockMediumSeverityRule.yaml
Version	1.0.1
Arm template	4e7d1851-5aab-478d-b348-4b83dc2b03d9.json

KQL

// Network Indicators with Block Action Rule
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 (isempty(Roles) or not(Roles has_any ('Command & Control', 'Malware', 'TOR', 'Trojan', 'Phishing')))
| 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

customDetails:
  Tags: Tags
  Sources: Sources
  ThreatType: ThreatType
  IPAbuse: IPAbuse
  Modified: modified
  ConfidenceScore: ConfidenceScore
  ThreatActors: ThreatActors
  ValidFrom: valid_from
  RecommendedActions: RecommendedActions
  Created: created
  Description: Description
  Country: Country
  IndicatorID: IndicatorID
  Roles: Roles
  SecurityVendors: SecurityVendors
  TimeGenerated: TimeGenerated
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/NetworkIndicatorsBlockMediumSeverityRule.yaml
alertDetailsOverride:
  alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators with Block Action Rule - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
query: |
  // Network Indicators with Block Action Rule
  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 (isempty(Roles) or not(Roles has_any ('Command & Control', 'Malware', 'TOR', 'Trojan', 'Phishing')))
  | 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  
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    enabled: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
  createIncident: true
relevantTechniques:
- T1566
- T1189
- T1204
- T1595
- T1498
- T1566.002
- T1204.001
- T1595.002
kind: Scheduled
name: CYFIRMA - Medium severity Malicious Network Indicators with Block Action Rule
tactics:
- InitialAccess
- Execution
- Reconnaissance
- Impact
severity: Medium
suppressionDuration: 5m
enabled: false
triggerOperator: GreaterThan
description: |
  "This rule detects network-based indicators such as IP addresses, domains, and URLs reported by CYFIRMA threat intelligence with a recommended action of 'Block' and no specified role. 
  These indicators may be associated with infrastructure used in phishing campaigns, malware, or initial access via watering hole or drive-by compromise techniques."  
queryFrequency: 5m
triggerThreshold: 0
queryPeriod: 5m
version: 1.0.1
suppressionEnabled: true
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPv4
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: IPv6
  entityType: IP
- fieldMappings:
  - identifier: DomainName
    columnName: Domain
  entityType: DNS
- fieldMappings:
  - identifier: Url
    columnName: URL
  entityType: URL
eventGroupingSettings:
  aggregationKind: AlertPerResult
id: 4e7d1851-5aab-478d-b348-4b83dc2b03d9

ARM