title: CobaltStrike Named Pipe Pattern Regex
id: 0e7163d4-9e19-4fa7-9be6-000c61aad77a
status: experimental
description: Detects the creation of a named pipe matching a pattern used by CobaltStrike Malleable C2 profiles
references:
    - https://svch0st.medium.com/guide-to-named-pipes-and-hunting-for-cobalt-strike-pipes-dc46b2c5f575
    - https://gist.github.com/MHaggis/6c600e524045a6d49c35291a21e10752
date: 2021/07/30
modified: 2021/09/02
author: Florian Roth
tags:
    - attack.defense_evasion
    - attack.privilege_escalation
    - attack.t1055
logsource:
   product: windows
   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 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 always use Cobalt Strike, but also you can check powershell script from this site https://svch0st.medium.com/guide-to-named-pipes-and-hunting-for-cobalt-strike-pipes-dc46b2c5f575'
detection:
   selection:
      - PipeName|re: '\\\\mojo\.5688\.8052\.(?:183894939787088877|35780273329370473)[0-9a-f]{2}'
      - PipeName|re: '\\\\wkssvc_?[0-9a-f]{2}'
      - PipeName|re: '\\\\ntsvcs[0-9a-f]{2}'
      - PipeName|re: '\\\\DserNamePipe[0-9a-f]{2}'
      - PipeName|re: '\\\\SearchTextHarvester[0-9a-f]{2}'
      - PipeName|re: '\\\\mypipe\-(?:f|h)[0-9a-f]{2}'
      - PipeName|re: '\\\\windows\.update\.manager[0-9a-f]{2,3}'
      - PipeName|re: '\\\\ntsvcs_[0-9a-f]{2}'
      - PipeName|re: '\\\\scerpc_?[0-9a-f]{2}'
      - PipeName|re: '\\\\PGMessagePipe[0-9a-f]{2}'
      - PipeName|re: '\\\\MsFteWds[0-9a-f]{2}'
      - PipeName|re: '\\\\f4c3[0-9a-f]{2}'
      - PipeName|re: '\\\\fullduplex_[0-9a-f]{2}'
      - PipeName|re: '\\\\msrpc_[0-9a-f]{4}'
      - PipeName|re: '\\\\win\\\\msrpc_[0-9a-f]{2}'
      - PipeName|re: '\\\\f53f[0-9a-f]{2}'
      - PipeName|re: '\\\\rpc_[0-9a-f]{2}'
      - PipeName|re: '\\\\spoolss_[0-9a-f]{2}'
      - PipeName|re: '\\\\Winsock2\\\\CatalogChangeListener-[0-9a-f]{3}-0,'
   condition: selection
falsepositives:
   - Unknown
level: critical
