Privilege Escalation via Named Pipe Impersonation — Sigma Rule

Rule metadata and linked tags

Author: Tim Rauch, Elastic (idea). Source status: test; severity: high. Source dates: 2022-09-27 / 2022-12-30.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 25e5d4b149814d1b7fe79d25fd9837edda1b8708b0df3e6c708a62607801fcd9

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Privilege Escalation via Named Pipe Impersonation
id: 9bd04a79-dabe-4f1f-a5ff-92430265c96b
related:
    - id: f35c5d71-b489-4e22-a115-f003df287317
      type: derived
status: test
description: Detects a remote file copy attempt to a hidden network share. This may indicate lateral movement or data staging activity.
references:
    - https://www.elastic.co/guide/en/security/current/privilege-escalation-via-named-pipe-impersonation.html
author: Tim Rauch, Elastic (idea)
date: 2022-09-27
modified: 2022-12-30
tags:
    - attack.lateral-movement
    - attack.t1021
logsource:
    category: process_creation
    product: windows
detection:
    selection_name:
        - Image|endswith:
              - '\cmd.exe'
              - '\powershell.exe'
        - OriginalFileName:
              - 'Cmd.Exe'
              - 'PowerShell.EXE'
    selection_args:
        CommandLine|contains|all:
            - 'echo'
            - '>'
            - '\\\\.\\pipe\\'
    condition: all of selection*
falsepositives:
    - Other programs that cause these patterns (please report)
level: high

Original YAML and metadata in JSON

False positives

• Other programs that cause these patterns (please report)

Source references

• https://www.elastic.co/guide/en/security/current/privilege-escalation-via-named-pipe-impersonation.html