First Time Seen Remote Named Pipe - Zeek

testhigh
log source: zeek · smb_filesauthor Samir Bousseaden, @neu5ron, Tim Sheltondate 2020-04-02
01

description

What this is, in brief.

This detection excludes known namped pipes accessible remotely and notify on newly observed ones, may help to detect lateral movement and remote exec using named pipes

02

tags

attack.lateral-movementattack.t1021.002
03

rule source (YAML)

title: First Time Seen Remote Named Pipe - Zeek
id: 021310d9-30a6-480a-84b7-eaa69aeb92bb
related:
    - id: 52d8b0c6-53d6-439a-9e41-52ad442ad9ad
      type: derived
status: test
description: This detection excludes known namped pipes accessible remotely and notify on newly observed ones, may help to detect lateral movement and remote exec using named pipes
references:
    - https://twitter.com/menasec1/status/1104489274387451904
author: Samir Bousseaden, @neu5ron, Tim Shelton
date: 2020-04-02
modified: 2022-12-27
tags:
    - attack.lateral-movement
    - attack.t1021.002
logsource:
    product: zeek
    service: smb_files
detection:
    selection:
        path: '\\\\\*\\IPC$' # Looking for the string \\*\IPC$
    filter_keywords:
        - 'samr'
        - 'lsarpc'
        - 'winreg'
        - 'netlogon'
        - 'srvsvc'
        - 'protected_storage'
        - 'wkssvc'
        - 'browser'
        - 'netdfs'
        - 'svcctl'
        - 'spoolss'
        - 'ntsvcs'
        - 'LSM_API_service'
        - 'HydraLsPipe'
        - 'TermSrv_API_service'
        - 'MsFteWds'
    condition: selection and not 1 of filter_*
falsepositives:
    - Update the excluded named pipe to filter out any newly observed legit named pipe
level: high
04

detects techniques (1)

ATT&CK techniques this enables or maps to.

05

references

External citations — patches, advisories, analysis.