CYFIRMA - High severity Malicious Network Indicators with Block Action Rule

Back


Id	58ae2c87-fc07-434b-aacf-f66d25b25e7e
Rulename	CYFIRMA - High 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	High
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/NetworkIndicatorsBlockHighSeverityRule.yaml
Version	1.0.1
Arm template	58ae2c87-fc07-434b-aacf-f66d25b25e7e.json

KQL

// Network Indicators with Block Action Rule
let timeFrame= 5m;
CyfirmaIndicators_CL 
| where ConfidenceScore >= 80
    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

eventGroupingSettings:
  aggregationKind: AlertPerResult
version: 1.0.1
suppressionEnabled: true
query: |
  // Network Indicators with Block Action Rule
  let timeFrame= 5m;
  CyfirmaIndicators_CL 
  | where ConfidenceScore >= 80
      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
id: 58ae2c87-fc07-434b-aacf-f66d25b25e7e
tactics:
- InitialAccess
- Execution
- Reconnaissance
- Impact
queryPeriod: 5m
queryFrequency: 5m
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
customDetails:
  Sources: Sources
  Modified: modified
  Created: created
  ValidFrom: valid_from
  TimeGenerated: TimeGenerated
  SecurityVendors: SecurityVendors
  ThreatType: ThreatType
  IPAbuse: IPAbuse
  RecommendedActions: RecommendedActions
  Country: Country
  ConfidenceScore: ConfidenceScore
  Tags: Tags
  Roles: Roles
  IndicatorID: IndicatorID
  Description: Description
  ThreatActors: ThreatActors
triggerOperator: GreaterThan
triggerThreshold: 0
severity: High
relevantTechniques:
- T1566
- T1189
- T1204
- T1595
- T1498
- T1566.002
- T1204.001
- T1595.002
enabled: false
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
kind: Scheduled
suppressionDuration: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/NetworkIndicatorsBlockHighSeverityRule.yaml
name: CYFIRMA - High severity Malicious Network Indicators with Block Action Rule
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators with Block Action Rule - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
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."

ARM