Medium Severity

Service abuse: Self-service platform redirecting to newly registered suspicious domain

Description

Detects inbound emails containing links to self-service creation platforms that ultimately redirect to newly registered domains (less than 30 days old) using suspicious top-level domains, indicating potential abuse of legitimate services.

References

No references.

Sublime Security
Created Sep 10th, 2026 • Last updated Oct 1st, 2026
Source
type.inbound
and any(body.current_thread.links,
        .href_url.domain.root_domain in $self_service_creation_platform_domains
        and (
          // anchors present in the rendered DOM
          any(ml.link_analysis(.).final_dom.links,
              network.whois(.href_url.domain).days_old < 30
              and .href_url.domain.tld in $suspicious_tlds
          )
          // or links rendered client-side, which never become anchors in final_dom.links
          or any(filter(regex.iextract(ml.link_analysis(.).final_dom.raw,
                                       'https:[/\\]+(?P<host>[a-z0-9][a-z0-9.-]{2,60}\.[a-z]{2,12})'
                        ),
                        strings.parse_domain(.named_groups["host"]).tld in $suspicious_tlds
                        and strings.parse_domain(.named_groups["host"]).root_domain not in $tranco_1m
                 ),
                 network.whois(strings.parse_domain(.named_groups["host"])).days_old < 30
          )
        )
)
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