PUA - RemCom Default Named Pipe — Sigma Rule

Rule metadata and linked tags

Author: Nikita Nazarov, oscd.community, Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-08-07 / 2023-11-30.

{
  "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"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 348ff33823b219475fc405ac9bb1934572888c8013cce9c50f488da5abef08f0

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: PUA - RemCom Default Named Pipe
id: d36f87ea-c403-44d2-aa79-1a0ac7c24456
related:
    - id: 9e77ed63-2ecf-4c7b-b09d-640834882028
      type: obsolete
status: test
description: Detects default RemCom pipe creation
references:
    - https://drive.google.com/file/d/1lKya3_mLnR3UQuCoiYruO3qgu052_iS_/view
    - https://github.com/kavika13/RemCom
author: Nikita Nazarov, oscd.community, Nasreddine Bencherchali (Nextron Systems)
date: 2023-08-07
modified: 2023-11-30
tags:
    - attack.lateral-movement
    - attack.t1021.002
    - attack.execution
    - attack.t1569.002
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: '\RemCom'
    condition: selection
falsepositives:
    - Legitimate Administrator activity
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate Administrator activity

Source references

• https://drive.google.com/file/d/1lKya3_mLnR3UQuCoiYruO3qgu052_iS_/view
• https://github.com/kavika13/RemCom