CYFIRMA - High severity Malicious Network Indicators Associated with Malware - Monitor Recommended Rule

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Id	c7b0b6da-e9dc-405d-ad71-37661f56d40a
Rulename	CYFIRMA - High severity Malicious Network Indicators Associated with Malware - Monitor Recommended Rule
Description	“This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure. These may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts.”
Severity	High
Tactics	InitialAccess Execution CommandAndControl
Techniques	T1566 T1189 T1204 T1071 T1090 T1059 T1568 T1566.002 T1204.001 T1071.001 T1568.002
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/MalwareNetworkIndicatorsMonitorHighSeverityRule.yaml
Version	1.0.1
Arm template	c7b0b6da-e9dc-405d-ad71-37661f56d40a.json

KQL

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

relevantTechniques:
- T1566
- T1189
- T1204
- T1071
- T1090
- T1059
- T1568
- T1566.002
- T1204.001
- T1071.001
- T1568.002
suppressionEnabled: true
triggerOperator: GreaterThan
eventGroupingSettings:
  aggregationKind: AlertPerResult
version: 1.0.1
triggerThreshold: 0
description: |
  "This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure.
  These may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts."  
tactics:
- InitialAccess
- Execution
- CommandAndControl
severity: High
kind: Scheduled
queryPeriod: 5m
queryFrequency: 5m
alertDetailsOverride:
  alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators Associated with Malware - Monitor Recommended - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/MalwareNetworkIndicatorsMonitorHighSeverityRule.yaml
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
enabled: false
id: c7b0b6da-e9dc-405d-ad71-37661f56d40a
customDetails:
  Created: created
  RecommendedActions: RecommendedActions
  SecurityVendors: SecurityVendors
  ThreatActors: ThreatActors
  Description: Description
  Modified: modified
  IndicatorID: IndicatorID
  Roles: Roles
  IPAbuse: IPAbuse
  Tags: Tags
  ConfidenceScore: ConfidenceScore
  TimeGenerated: TimeGenerated
  Sources: Sources
  ThreatType: ThreatType
  Country: Country
  ValidFrom: valid_from
query: |
  //Network Indicators Associated with Malware - Monitor Recommended Rule
  let timeFrame= 5m;
  CyfirmaIndicators_CL 
  | where ConfidenceScore >= 80
      and TimeGenerated between (ago(timeFrame) .. now())
      and pattern !contains 'file:hashes' and RecommendedActions has 'Monitor' and Roles has 'Malware'
  | 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  
suppressionDuration: 5m
name: CYFIRMA - High severity Malicious Network Indicators Associated with Malware - Monitor Recommended Rule

ARM