Whisper Security - C2 Communication Detection

id: 00682c4c-b8b5-5ef7-af33-50891b271b7b
name: Whisper Security - C2 Communication Detection
description: |
  Detects command-and-control communication by joining CommonSecurityLog with Whisper threat intelligence data. Fires when network traffic matches a known C2 indicator with a threat score above 60.
severity: High
status: Available
requiredDataConnectors:
- connectorId: WhisperSecurityConnector
  dataTypes:
  - WhisperThreatIntel_CL
queryFrequency: 5m
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- CommandAndControl
relevantTechniques:
- T1071
query: |
  // MITRE ATT&CK: T1071 - Application Layer Protocol
  // Tactic: Command and Control
  // Detects C2 communication by correlating network logs with Whisper threat intel
  let timeRange = 1h;
  let threatThreshold = 60;
  let c2Indicators = WhisperThreatIntel_CL
      | where TimeGenerated > ago(timeRange)
      | where isC2 == true
      | where threatScore > threatThreshold
      | project indicator, threatScore, threatLevel, feedNames, explanation, lastSeen;
  let CommonSecurityLogSafe = union isfuzzy=true CommonSecurityLog, (datatable(TimeGenerated:datetime, DestinationIP:string, DestinationHostName:string, SourceIP:string, DeviceProduct:string, DeviceAction:string)[]);
  CommonSecurityLogSafe
      | where TimeGenerated > ago(timeRange)
      | where isnotempty(DestinationIP) or isnotempty(DestinationHostName)
      | extend matchIndicator = coalesce(DestinationHostName, DestinationIP)
      | join kind=inner (c2Indicators) on $left.matchIndicator == $right.indicator
      | extend SourceIP = SourceIP, DestinationIP = DestinationIP, DnsDomain = DestinationHostName
      | project TimeGenerated, SourceIP, DestinationIP, DnsDomain, DeviceProduct, DeviceAction, threatScore, threatLevel, feedNames, explanation
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SourceIP
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: DestinationIP
- entityType: DNS
  fieldMappings:
  - identifier: DomainName
    columnName: DnsDomain
customDetails:
  ThreatScore: threatScore
  ThreatLevel: threatLevel
  FeedNames: feedNames
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
version: 1.0.0
kind: Scheduled