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

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Id	ee2325cc-f5ba-49ac-b4d9-58ef0766e168
Rulename	CYFIRMA - Medium 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	Medium
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/MalwareNetworkIndicatorsMonitorMediumSeverityRule.yaml
Version	1.0.1
Arm template	ee2325cc-f5ba-49ac-b4d9-58ef0766e168.json

KQL

//Network Indicators Associated with Malware - Monitor Recommended 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 '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

queryPeriod: 5m
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."  
kind: Scheduled
query: |
  //Network Indicators Associated with Malware - Monitor Recommended 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 '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
tactics:
- InitialAccess
- Execution
- CommandAndControl
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    reopenClosedIncident: false
  createIncident: true
triggerOperator: GreaterThan
enabled: false
suppressionEnabled: true
alertDetailsOverride:
  alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators Associated with Malware - Monitor Recommended - {{name}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDescriptionFormat: '{{Description}} - {{name}} '
id: ee2325cc-f5ba-49ac-b4d9-58ef0766e168
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/MalwareNetworkIndicatorsMonitorMediumSeverityRule.yaml
version: 1.0.1
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
triggerThreshold: 0
customDetails:
  SecurityVendors: SecurityVendors
  ConfidenceScore: ConfidenceScore
  ThreatActors: ThreatActors
  IndicatorID: IndicatorID
  RecommendedActions: RecommendedActions
  Modified: modified
  ValidFrom: valid_from
  Created: created
  ThreatType: ThreatType
  IPAbuse: IPAbuse
  Roles: Roles
  Tags: Tags
  TimeGenerated: TimeGenerated
  Sources: Sources
  Country: Country
  Description: Description
eventGroupingSettings:
  aggregationKind: AlertPerResult
relevantTechniques:
- T1566
- T1189
- T1204
- T1071
- T1090
- T1059
- T1568
- T1566.002
- T1204.001
- T1071.001
- T1568.002
name: CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Monitor Recommended Rule
severity: Medium
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
queryFrequency: 5m

ARM