Powershell Add Name Resolution Policy Table Rule

testhigh
Log-Quelle: windows · ps_scriptAutor Borna TalebiDatum 2021-09-14
01

Beschreibung

Was dies ist, in Kürze.

Detects powershell scripts that adds a Name Resolution Policy Table (NRPT) rule for the specified namespace. This will bypass the default DNS server and uses a specified server for answering the query.

02

Tags

attack.impactattack.t1565
03

Regelquelle (YAML)

title: Powershell Add Name Resolution Policy Table Rule
id: 4368354e-1797-463c-bc39-a309effbe8d7
status: test
description: |
  Detects powershell scripts that adds a Name Resolution Policy Table (NRPT) rule for the specified namespace.
  This will bypass the default DNS server and uses a specified server for answering the query.
references:
    - https://twitter.com/NathanMcNulty/status/1569497348841287681
    - https://learn.microsoft.com/en-us/powershell/module/dnsclient/add-dnsclientnrptrule?view=windowsserver2022-ps
author: Borna Talebi
date: 2021-09-14
modified: 2022-10-09
tags:
    - attack.impact
    - attack.t1565
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - 'Add-DnsClientNrptRule'
            - '-Namesp'
            - '-NameSe'
    condition: selection
falsepositives:
    - Unknown
level: high
04

erkennt Techniken (1)

ATT&CK-Techniken, die dies ermöglicht oder abbildet.

05

Referenzen

Externe Belege — Patches, Meldungen, Analysen.