
title: EfsPotato Named Pipe
author: Florian Roth
date: 2021/08/23
description: Detects the pattern of a pipe name as used by the tool EfsPotato
detection:
  SELECTION_1:
    EventID: 17
  SELECTION_2:
    EventID: 18
  SELECTION_3:
    PipeName:
    - '*\pipe\\*'
    - '*\pipe\srvsvc*'
  condition: ((SELECTION_1 or SELECTION_2) and SELECTION_3)
falsepositives:
- Unknown
id: 637f689e-b4a5-4a86-be0e-0100a0a33ba2
level: critical
logsource:
  category: pipe_created
  definition: Note that you have to configure logging for Named Pipe Events in Sysmon
    config (Event ID 17 and Event ID 18). The basic configuration is in popular sysmon
    configuration (https://github.com/SwiftOnSecurity/sysmon-config), but it is worth
    verifying. You can also use other repo, e.g. https://github.com/Neo23x0/sysmon-config,
    https://github.com/olafhartong/sysmon-modular. How to test detection? You can
    check powershell script from this site https://svch0st.medium.com/guide-to-named-pipes-and-hunting-for-cobalt-strike-pipes-dc46b2c5f575
  product: windows
references:
- https://twitter.com/SBousseaden/status/1429530155291193354?s=20
- https://github.com/zcgonvh/EfsPotato
status: experimental
tags:
- attack.defense_evasion
- attack.privilege_escalation
- attack.t1055
ruletype: SIGMA
