Windows DNS Query Detection for Diamond Sleet–Related Domains

title: Windows DNS Query Detection for Diamond Sleet–Related Domains
id: bcb8a25a-fb2b-43ad-81d0-696cdd354560
status: test
description: "This rule flags Windows DNS queries whose QueryName contains one of four domain indicators: 3dkit.org, dersmarketim.com, galerielamy.com, or olidhealth.com. Attackers commonly use DNS queries to resolve attacker-controlled domains for command-and-control or staging infrastructure, making these lookups a valuable pivot point. It relies on DNS query telemetry including the queried name (QueryName) to match the specified substrings."
references:
  - https://www.microsoft.com/en-us/security/blog/2023/10/18/multiple-north-korean-threat-actors-exploiting-the-teamcity-cve-2023-42793-vulnerability/
  - https://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2023/TA/Diamond-Sleet/dns_query_win_apt_diamond_steel_indicators.yml
author: Nasreddine Bencherchali (Nextron Systems), Huntrule Team
date: 2023-10-24
tags:
  - attack.command-and-control
  - detection.emerging-threats
logsource:
  product: windows
  category: dns_query
detection:
  selection:
    QueryName|contains:
      - 3dkit.org
      - dersmarketim.com
      - galerielamy.com
      - olidhealth.com
  condition: selection
falsepositives:
  - Might generate some false positive if triggered by a user during investigation for example.
level: high
license: DRL-1.1
related:
  - id: fba38e0f-4607-4344-bb8f-a4b50cdeef7f
    type: derived