title: DNS RCE CVE-2020-1350
id: b5281f31-f9cc-4d0d-95d0-45b91c45b487
status: test
description: Detects exploitation of DNS RCE bug reported in CVE-2020-1350 by the detection of suspicious sub process
author: Florian Roth
references:
  - https://research.checkpoint.com/2020/resolving-your-way-into-domain-admin-exploiting-a-17-year-old-bug-in-windows-dns-servers/
  - https://blog.menasec.net/2019/02/threat-hunting-24-microsoft-windows-dns.html
date: 2020/07/15
modified: 2021/11/27
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    ParentImage|endswith: '\System32\dns.exe'
  filter:
    Image|endswith:
      - '\System32\werfault.exe'
      - '\System32\conhost.exe'
      - '\System32\dnscmd.exe'
  condition: selection and not filter
falsepositives:
  - Unknown but benign sub processes of the Windows DNS service dns.exe
level: critical
tags:
  - attack.initial_access
  - attack.t1190
  - attack.execution
  - attack.t1569.002
