santander-es[.]serv00[.]net

Analysis shows that santander-es.serv00.net is an active infrastructure used for account takeover campaigns. The domain was created on February 21, 2026 and is registered through OVH sas. It resolves to the IPv4 address 128.204.223.42, which belongs to AS57367 Atman Sp. z o.o. located in Poland. DNS resolution is handled by dns1.serv00.com and dns2.serv00.com. The web server runs Nginx and presents a Let's Encrypt certificate (E8). An HTTP request returns a 403 status with the page title "Serv00.com - Free Website Hosting - 403 Website blocked," indicating that the site is currently inaccessible or deliberately blocked. The domain is listed on two security blocklists, PhishDestroy and PhishingDB, and appears on two additional blocklists overall. VirusTotal scans show five of ninety‑five security vendors flag the domain, and Gridinsoft assigns a trust score of zero out of one hundred, reinforcing the high‑risk assessment. While the specific victim‑targeted brand is not confirmed in the available intelligence, the presence of "santander-es" in the subdomain suggests a possible attempt to lure users of the Santander banking service. Defenders should immediately block DNS resolution and network traffic to 128.204.223.42, add the domain to email and web filtering rules, and monitor for any related command‑and‑control traffic. Continuous re‑evaluation is advised, as the site may become active again or change hosting characteristics.