Start by capturing the exact URL, the visible claim, and the time you accessed it before you pivot anywhere else. Domain investigations become harder to defend when the first snapshot is missing.
Recommended sequence
- Preserve the visible page with urlscan.io, Wayback Machine, or Archive.today if the content may change.
- Check domain history, DNS records, and certificate clues with SecurityTrails, crt.sh, and WHOIS-style lookups.
- Expand the infrastructure view with Shodan or Censys when the case depends on hosts, ports, certificates, or related services.
- Only move into reporting after you have at least two independent signals that support the same ownership or attribution story.
Where this breaks down
Registrar data can be stale, privacy protection can hide ownership, and reused infrastructure can create false links. A shared host or reused certificate is not proof of a shared operator.
Before you publish
Keep screenshots, timestamps, and the exact pivot trail. If the conclusion depends on inference rather than direct evidence, label it as such.