CYFIRMA - High severity Malicious Phishing Network Indicators - Block Recommended Rule

Back


Id	6f053867-dbd8-4755-924d-577e3db7f5a6
Rulename	CYFIRMA - High severity Malicious Phishing Network Indicators - Block Recommended Rule
Description	“This analytics rule identifies network-based indicators such as URLs, IP addresses, and domains related to phishing campaigns, as reported by CYFIRMA threat intelligence. These indicators are flagged with a recommended action to block and are categorized under the ‘Phishing’ role. Such infrastructure is often used to deliver phishing emails, host fake login portals, or redirect victims to credential-harvesting pages. Blocking these indicators proactively helps prevent user compromise and data theft.”
Severity	High
Tactics	InitialAccess Execution CredentialAccess Exfiltration
Techniques	T1566 T1204 T1556 T1110 T1041 T1566.001 T1566.002 T1204.001 T1556.002 T1110.003
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/PhishingNetworkIndicatorsBlockHighSeverityRule.yaml
Version	1.0.1
Arm template	6f053867-dbd8-4755-924d-577e3db7f5a6.json

KQL

//Malicious Phishing Network Indicators - Block Recommended
let timeFrame= 5m;
CyfirmaIndicators_CL 
| where ConfidenceScore >= 80
    and TimeGenerated between (ago(timeFrame) .. now())
    and pattern !contains 'file:hashes' and RecommendedActions has 'Block' and Roles has '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

OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/PhishingNetworkIndicatorsBlockHighSeverityRule.yaml
kind: Scheduled
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    lookbackDuration: PT5H
    enabled: false
    matchingMethod: AllEntities
    reopenClosedIncident: false
suppressionEnabled: true
suppressionDuration: 5m
triggerThreshold: 0
version: 1.0.1
customDetails:
  ConfidenceScore: ConfidenceScore
  Country: Country
  Modified: modified
  ValidFrom: valid_from
  ThreatActors: ThreatActors
  ThreatType: ThreatType
  TimeGenerated: TimeGenerated
  Sources: Sources
  IPAbuse: IPAbuse
  IndicatorID: IndicatorID
  RecommendedActions: RecommendedActions
  Description: Description
  Created: created
  SecurityVendors: SecurityVendors
  Roles: Roles
  Tags: Tags
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPv4
    identifier: Address
- entityType: IP
  fieldMappings:
  - columnName: IPv6
    identifier: Address
- entityType: DNS
  fieldMappings:
  - columnName: Domain
    identifier: DomainName
- entityType: URL
  fieldMappings:
  - columnName: URL
    identifier: Url
enabled: false
eventGroupingSettings:
  aggregationKind: AlertPerResult
queryFrequency: 5m
name: CYFIRMA - High severity Malicious Phishing Network Indicators - Block Recommended Rule
description: |
  "This analytics rule identifies network-based indicators such as URLs, IP addresses, and domains related to phishing campaigns, as reported by CYFIRMA threat intelligence. 
  These indicators are flagged with a recommended action to block and are categorized under the 'Phishing' role.
  Such infrastructure is often used to deliver phishing emails, host fake login portals, or redirect victims to credential-harvesting pages. 
  Blocking these indicators proactively helps prevent user compromise and data theft."  
tactics:
- InitialAccess
- Execution
- CredentialAccess
- Exfiltration
query: |
  //Malicious Phishing Network Indicators - Block Recommended
  let timeFrame= 5m;
  CyfirmaIndicators_CL 
  | where ConfidenceScore >= 80
      and TimeGenerated between (ago(timeFrame) .. now())
      and pattern !contains 'file:hashes' and RecommendedActions has 'Block' and Roles has '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  
queryPeriod: 5m
triggerOperator: GreaterThan
id: 6f053867-dbd8-4755-924d-577e3db7f5a6
relevantTechniques:
- T1566
- T1204
- T1556
- T1110
- T1041
- T1566.001
- T1566.002
- T1204.001
- T1556.002
- T1110.003
severity: High
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
alertDetailsOverride:
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDisplayNameFormat: 'High-Confidence Malicious Phishing Network Indicators - Block Recommended - {{name}} '

ARM