Certificate Trail
100 points · 0 solved
Acme Corp says their old build server was shut down years ago. Certificate Transparency logs are public and never forget. Find their CI server. The flag is ss{<first label of that hostname>}.
2026-10-21 R11 (Let's Encrypt) shop.acme-corp.example
2026-07-11 R11 (Let's Encrypt) mail.acme-corp.example
2026-03-10 R11 (Let's Encrypt) www.acme-corp.example
2026-06-27 R11 (Let's Encrypt) jenkins-legacy-7f3a.acme-corp.example
2026-05-21 R11 (Let's Encrypt) vpn.acme-corp.example
2026-08-08 R11 (Let's Encrypt) grafana.acme-corp.example
2026-04-02 R11 (Let's Encrypt) api.acme-corp.example
2026-04-24 R11 (Let's Encrypt) status.acme-corp.exampleHints0/2