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

queryPeriod: 5m
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  
enabled: false
name: CYFIRMA - Medium severity Malicious Network Indicators with Block Action Rule
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
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: false
  createIncident: true
suppressionDuration: 5m
suppressionEnabled: true
alertDetailsOverride:
  alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators with Block Action Rule - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
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."  
kind: Scheduled
version: 1.0.1
eventGroupingSettings:
  aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/NetworkIndicatorsBlockMediumSeverityRule.yaml
queryFrequency: 5m
severity: Medium
requiredDataConnectors:
- connectorId: CyfirmaCyberIntelligenceDC
  dataTypes:
  - CyfirmaIndicators_CL
triggerOperator: GreaterThan
triggerThreshold: 0
customDetails:
  SecurityVendors: SecurityVendors
  ValidFrom: valid_from
  IPAbuse: IPAbuse
  ThreatType: ThreatType
  TimeGenerated: TimeGenerated
  Roles: Roles
  Tags: Tags
  Description: Description
  Modified: modified
  IndicatorID: IndicatorID
  Created: created
  ThreatActors: ThreatActors
  RecommendedActions: RecommendedActions
  ConfidenceScore: ConfidenceScore
  Sources: Sources
  Country: Country
tactics:
- InitialAccess
- Execution
- Reconnaissance
- Impact
id: 4e7d1851-5aab-478d-b348-4b83dc2b03d9
relevantTechniques:
- T1566
- T1189
- T1204
- T1595
- T1498
- T1566.002
- T1204.001
- T1595.002

ARM