att[.]irstm[.]cc

The domain att.irstm.cc was registered on February 21, 2026 through Gname.com Pte. Ltd. and is hosted on Cloudflare infrastructure (ASN 13335, United States). DNS resolution points to IP address 104.21.11.69, which is owned by Cloudflare, Inc. The authoritative nameservers are alexia.ns.cloudflare.com and josh.ns.cloudflare.com. No SSL certificate is associated with the host, and the HTTP response returns a generic "Welcome to nginx!" page title, indicating that no brand‑specific landing page has been observed. Threat intelligence classifies the site as a brand‑impersonation campaign targeting the x.com brand, and it has been flagged by 14 of 93 security vendors on VirusTotal.

The domain appears on one external blocklist and is actively blocked by PhishDestroy. Additional scoring from Gridinsoft assigns a trust rating of 0 out of 100, reinforcing the malicious assessment. The site is currently listed as offline, suggesting that the operators have taken it down or that takedown actions have been successful.

However, the underlying infrastructure—Cloudflare edge nodes—remains reusable for future campaigns, and the domain registration details provide a clear vector for attribution. Defenders should ensure that att.irstm.cc is added to domain blocklists, enforce DNS‑level filtering, and monitor for re‑use of the same IP or nameserver pair. Continuous vigilance is advised because the absence of TLS does not preclude the deployment of a malicious payload on a subsequent re‑activation of the domain.