{"id":"aff715fa-4dd5-497a-8db3-910bea555566","title":"DNS Query to External Service Interaction Domains","description":"Detects suspicious DNS queries to external service interaction domains often used for out-of-band interactions after successful RCE\n","author":"Florian Roth (Nextron Systems), Matt Kelly (list of domains)","status":"test","level":"high","date":"2022-06-07","modified":"2026-01-24","tags":["attack.initial-access","attack.t1190","attack.reconnaissance","attack.t1595.002"],"technique_ids":["T1190","T1595.002"],"logsource":{"category":"dns"},"falsepositives":["Legitimate security scanning."],"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"],"source_path":"rules/network/dns/net_dns_external_service_interaction_domains.yml","source_sha256":"275ca1c0db582eccaacd35c9e3c4b5660c82cedafea65808795997708ee3a482","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/network/dns/net_dns_external_service_interaction_domains.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: DNS Query to External Service Interaction Domains\nid: aff715fa-4dd5-497a-8db3-910bea555566\nstatus: test\ndescription: |\n    Detects suspicious DNS queries to external service interaction domains often used for out-of-band interactions after successful RCE\nreferences:\n    - https://twitter.com/breakersall/status/1533493587828260866\n    - https://www.bitdefender.com/en-us/blog/businessinsights/bitdefender-advisory-critical-unauthenticated-rce-windows-server-update-services-cve-2025-59287\n    - https://github.com/SigmaHQ/sigma/pull/5724#issuecomment-3466382234\nauthor: Florian Roth (Nextron Systems), Matt Kelly (list of domains)\ndate: 2022-06-07\nmodified: 2026-01-24\ntags:\n    - attack.initial-access\n    - attack.t1190\n    - attack.reconnaissance\n    - attack.t1595.002\nlogsource:\n    category: dns\ndetection:\n    selection:\n        query|endswith:\n            - '.burpcollaborator.net' # Portswigger Burpsuite Collaborator\n            - '.canarytokens.com' # Thinkst Canary Canarytokens\n            - '.ceye.io'\n            - '.ddns.1443.eu.org' # dig.pm\n            - '.ddns.bypass.eu.org' # dig.pm\n            - '.ddns.xn--gg8h.eu.org' # dig.pm\n            - '.digimg.store' # dnslog.ink\n            - '.dns.su18.org' # javaweb.org\n            - '.dnshook.site' # webhook.site\n            - '.dnslog.cn'\n            - '.dnslog.ink' # dnslog.ink\n            - '.instances.httpworkbench.com' # httpworkbench.com\n            - '.interact.sh' # Project Discovery Interactsh\n            - '.log.dnslog.pp.ua' # dnslog.org\n            - '.log.dnslog.qzz.io' # dnslog.org\n            - '.log.dnslogs.dpdns.org' # dnslog.org\n            - '.log.javaweb.org' # javaweb.org\n            - '.log.nat.cloudns.ph' # dnslog.org\n            - '.oast.fun' # Project Discovery Interactsh\n            - '.oast.live' # Project Discovery Interactsh\n            - '.oast.me' # Project Discovery Interactsh\n            - '.oast.online' # Project Discovery Interactsh\n            - '.oast.pro' # Project Discovery Interactsh\n            - '.oast.site' # Project Discovery Interactsh\n            - '.oastify.com' # Portswigger Burpsuite Collaborator\n            - '.p8.lol' # javaweb.org\n            - '.requestbin.net'\n    filter_main_polling:\n        query|contains: 'polling.oastify.com'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Legitimate security scanning.\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1190","id":"T1190","name":"Exploit Public-Facing Application","page":"techniques/enterprise/T1190/"},{"key":"enterprise/T1595.002","id":"T1595.002","name":"Vulnerability Scanning","page":"techniques/enterprise/T1595.002/"}],"data_path":"data/detection-rules/aff715fa-4dd5-497a-8db3-910bea555566.json","kind":"sigma"}