Privilege Escalation via Named Pipe Impersonation

Elastic Stack Serverless Security

Identifies a privilege escalation attempt via named pipe impersonation. An adversary may abuse this technique by utilizing a framework such Metasploit’s meterpreter getsystem command.

Rule type: eql

Rule indices:

• winlogbeat-*
• logs-endpoint.events.*
• logs-windows.*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

• https://www.ired.team/offensive-security/privilege-escalation/windows-namedpipes-privilege-escalation

Tags:

• Elastic
• Host
• Windows
• Threat Detection
• Privilege Escalation

Version: 101

Rule authors:

• Elastic

Rule license: Elastic License v2

process where event.type == "start" and
 process.pe.original_file_name in ("Cmd.Exe", "PowerShell.EXE") and
 process.args : "echo" and process.args : ">" and process.args : "\\\\.\\pipe\\*"

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Privilege Escalation
  • ID: TA0004
  • Reference URL: https://attack.mitre.org/tactics/TA0004/

• Technique:

  • Name: Access Token Manipulation
  • ID: T1134
  • Reference URL: https://attack.mitre.org/techniques/T1134/