Binary Content Copy via Cmd.exe

Attackers may abuse cmd.exe commands to reassemble binary fragments into a malicious payload.

Rule type: eql
Rule indices:

• endgame-*
• logs-endpoint.events.process-*
• logs-system.security*
• logs-windows.sysmon_operational-*
• winlogbeat-*

Rule Severity: low
Risk Score: 21
Runs every: 60m
Searches indices from: now-119m
Maximum alerts per execution: ?
References:

Tags:

• Domain: Endpoint
• OS: Windows
• Use Case: Threat Detection
• Tactic: Defense Evasion
• Tactic: Execution
• Data Source: Elastic Defend
• Rule Type: BBR
• Data Source: Sysmon
• Data Source: Elastic Endgame
• Data Source: Windows Security Event Logs

Version: ?
Rule authors:

• Elastic

Rule license: Elastic License v2

process where host.os.type == "windows" and event.type == "start" and
  process.name : "cmd.exe" and (
    (process.args : "type" and process.args : (">", ">>")) or
    (process.args : "copy" and process.args : "/b"))

Framework: MITRE ATT&CK

• Tactic:

  • Name: Defense Evasion
  • Id: TA0005
  • Reference URL: https://attack.mitre.org/tactics/TA0005/

• Technique:

  • Name: Deobfuscate/Decode Files or Information
  • Id: T1140
  • Reference URL: https://attack.mitre.org/techniques/T1140/

Framework: MITRE ATT&CK

• Tactic:

  • Name: Execution
  • Id: TA0002
  • Reference URL: https://attack.mitre.org/tactics/TA0002/

• Technique:

  • Name: Command and Scripting Interpreter
  • Id: T1059
  • Reference URL: https://attack.mitre.org/techniques/T1059/

• Sub Technique:

  • Name: Windows Command Shell
  • Id: T1059.003
  • Reference URL: https://attack.mitre.org/techniques/T1059/003/