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CYFIRMA - Medium severity Trojan Network Indicators - Monitor Recommended Rule

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Id104f4574-fc95-4f38-8aa2-02f0b78eba9b
RulenameCYFIRMA - Medium severity Trojan Network Indicators - Monitor Recommended Rule
Description“This analytics rule detects network-based indicators flagged by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure.

These indicators may represent attacker-controlled endpoints used for persistence, data exfiltration, or command delivery to compromised systems.”
SeverityMedium
TacticsImpact
Persistence
DefenseEvasion
CredentialAccess
CommandAndControl
Execution
InitialAccess
TechniquesT1496
T1053
T1555
T1090
T1071
T1204
T1189
T1053.005
T1555.003
T1071.001
T1204.001
Required data connectorsCyfirmaCyberIntelligenceDC
KindScheduled
Query frequency5m
Query period5m
Trigger threshold0
Trigger operatorGreaterThan
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/TrojanNetworkIndicatorsMonitorMediumSeverityRule.yaml
Version1.0.1
Arm template104f4574-fc95-4f38-8aa2-02f0b78eba9b.json
Deploy To Azure
//Trojan Network Indicators - Monitor Recommended 
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 'Trojan'
| 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
id: 104f4574-fc95-4f38-8aa2-02f0b78eba9b
enabled: false
relevantTechniques:
- T1496
- T1053
- T1555
- T1090
- T1071
- T1204
- T1189
- T1053.005
- T1555.003
- T1071.001
- T1204.001
triggerOperator: GreaterThan
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPv4
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: IPv6
  entityType: IP
- fieldMappings:
  - identifier: DomainName
    columnName: Domain
  entityType: DNS
- fieldMappings:
  - identifier: Url
    columnName: URL
  entityType: URL
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: 'High-Confidence Trojan Network Indicators - Monitor Recommended Rule - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
queryFrequency: 5m
suppressionEnabled: true
queryPeriod: 5m
triggerThreshold: 0
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
  createIncident: true
query: |
  //Trojan Network Indicators - Monitor Recommended 
  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 'Trojan'
  | 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  
name: CYFIRMA - Medium severity Trojan Network Indicators - Monitor Recommended Rule
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/TrojanNetworkIndicatorsMonitorMediumSeverityRule.yaml
description: |
  "This analytics rule detects network-based indicators flagged by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure. 
  These indicators may represent attacker-controlled endpoints used for persistence, data exfiltration, or command delivery to compromised systems."  
severity: Medium
tactics:
- Impact
- Persistence
- DefenseEvasion
- CredentialAccess
- CommandAndControl
- Execution
- InitialAccess
suppressionDuration: 5m
version: 1.0.1
eventGroupingSettings:
  aggregationKind: AlertPerResult
customDetails:
  Modified: modified
  Tags: Tags
  RecommendedActions: RecommendedActions
  ValidFrom: valid_from
  Country: Country
  IPAbuse: IPAbuse
  ConfidenceScore: ConfidenceScore
  ThreatType: ThreatType
  Roles: Roles
  Created: created
  Sources: Sources
  Description: Description
  SecurityVendors: SecurityVendors
  ThreatActors: ThreatActors
  TimeGenerated: TimeGenerated
  IndicatorID: IndicatorID