Microsoft Sentinel Analytic Rules
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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
queryPeriod: 5m
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  
enabled: false
name: CYFIRMA - Medium severity Trojan Network Indicators - Monitor Recommended 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 Trojan Network Indicators - Monitor Recommended Rule - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
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."  
kind: Scheduled
version: 1.0.1
eventGroupingSettings:
  aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/TrojanNetworkIndicatorsMonitorMediumSeverityRule.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:
- Impact
- Persistence
- DefenseEvasion
- CredentialAccess
- CommandAndControl
- Execution
- InitialAccess
id: 104f4574-fc95-4f38-8aa2-02f0b78eba9b
relevantTechniques:
- T1496
- T1053
- T1555
- T1090
- T1071
- T1204
- T1189
- T1053.005
- T1555.003
- T1071.001
- T1204.001