HackTool - Koh Default Named Pipe

Title: HackTool - Koh Default Named Pipe
Status: test
Description:Detects creation of default named pipes used by the Koh tool
References:
  -https://github.com/GhostPack/Koh/blob/0283d9f3f91cf74732ad377821986cfcb088e20a/Clients/BOF/KohClient.c#L12
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2022-07-08
modified:2023-08-07
Tags:

• -'attack.privilege-escalation'
• -'attack.credential-access'
• -'attack.stealth'
• -'attack.t1528'
• -'attack.t1134.001'

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. 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

Detection:
  selection:
    PipeName|contains:
      -'\imposecost'
      -'\imposingcost'

  condition:selection
Falsepositives:
  -Unlikely
Level: critical