title: DNS Query to External Service Interaction Domains
id: aff715fa-4dd5-497a-8db3-910bea555566
status: test
description: |
Detects suspicious DNS queries to external service interaction domains often used for out-of-band interactions after successful RCE
references:
- https://twitter.com/breakersall/status/1533493587828260866
- https://www.bitdefender.com/en-us/blog/businessinsights/bitdefender-advisory-critical-unauthenticated-rce-windows-server-update-services-cve-2025-59287
- https://github.com/SigmaHQ/sigma/pull/5724#issuecomment-3466382234
author: Florian Roth (Nextron Systems), Matt Kelly (list of domains)
date: 2022-06-07
modified: 2026-01-24
tags:
- attack.initial-access
- attack.t1190
- attack.reconnaissance
- attack.t1595.002
logsource:
category: dns
detection:
selection:
query|endswith:
- '.burpcollaborator.net' # Portswigger Burpsuite Collaborator
- '.canarytokens.com' # Thinkst Canary Canarytokens
- '.ceye.io'
- '.ddns.1443.eu.org' # dig.pm
- '.ddns.bypass.eu.org' # dig.pm
- '.ddns.xn--gg8h.eu.org' # dig.pm
- '.digimg.store' # dnslog.ink
- '.dns.su18.org' # javaweb.org
- '.dnshook.site' # webhook.site
- '.dnslog.cn'
- '.dnslog.ink' # dnslog.ink
- '.instances.httpworkbench.com' # httpworkbench.com
- '.interact.sh' # Project Discovery Interactsh
- '.log.dnslog.pp.ua' # dnslog.org
- '.log.dnslog.qzz.io' # dnslog.org
- '.log.dnslogs.dpdns.org' # dnslog.org
- '.log.javaweb.org' # javaweb.org
- '.log.nat.cloudns.ph' # dnslog.org
- '.oast.fun' # Project Discovery Interactsh
- '.oast.live' # Project Discovery Interactsh
- '.oast.me' # Project Discovery Interactsh
- '.oast.online' # Project Discovery Interactsh
- '.oast.pro' # Project Discovery Interactsh
- '.oast.site' # Project Discovery Interactsh
- '.oastify.com' # Portswigger Burpsuite Collaborator
- '.p8.lol' # javaweb.org
- '.requestbin.net'
filter_main_polling:
query|contains: 'polling.oastify.com'
condition: selection and not 1 of filter_main_*
falsepositives:
- Legitimate security scanning.
level: high