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Elastic Docs ›Elastic Security Solution [8.15] ›Downloadable rule update v8.15.10

Execution via Windows Command Debugging Utility

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Execution via Windows Command Debugging Utility

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An adversary can use the Windows command line debugging utility cdb.exe to execute commands or shellcode. This rule looks for those instances and where the cdb.exe binary is outside of the normal WindowsKit installation paths.

Rule type: eql

Rule indices:

  • logs-endpoint.events.process-*
  • logs-windows.sysmon_operational-*
  • endgame-*
  • logs-sentinel_one_cloud_funnel.*
  • logs-m365_defender.event-*
  • logs-system.security-*
  • logs-crowdstrike.fdr*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Defense Evasion
  • Data Source: Elastic Endgame
  • Data Source: Elastic Defend
  • Data Source: Sysmon
  • Data Source: SentinelOne
  • Data Source: Microsoft Defender for Endpoint
  • Data Source: Crowdstrike

Version: 102

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "windows" and event.type == "start" and
 (?process.pe.original_file_name == "CDB.Exe" or process.name : "cdb.exe") and
  process.args : ("-cf", "-c", "-pd") and
  not process.executable : (
        "?:\\Program Files (x86)\\*\\cdb.exe",
        "?:\\Program Files\\*\\cdb.exe",
        "\\Device\\HarddiskVolume?\\Program Files (x86)\\*\\cdb.exe",
        "\\Device\\HarddiskVolume?\\Program Files\\*\\cdb.exe"
  )

Framework: MITRE ATT&CKTM

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