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Privilege Escalation via Named Pipe Impersonation

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Privilege Escalation via Named Pipe Impersonation

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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: 5 minutes

Searches indices from: now-9m (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: 6 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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

Threat mapping

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Framework: MITRE ATT&CK^TM

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/

Rule version history

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Version 6 (8.4.0 release)

Updated query, changed from:

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

Version 4 (8.2.0 release)

Formatting only

Version 3 (7.12.0 release)

Formatting only

Version 2 (7.11.2 release)

Formatting only

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