t-mobile[.]gocupq[.]top

This domain, t-mobile.gocupq.top, operates as a credential phishing site specifically designed to impersonate T-Mobile authentication portals. Analysis indicates the site presents a fraudulent login interface to deceive users into submitting sensitive account credentials, including usernames, passwords, and potentially multi-factor authentication codes. The domain's infrastructure and page content closely resemble legitimate T-Mobile properties, increasing the likelihood of successful social engineering attacks against unsuspecting customers. Infrastructure analysis reveals multiple high-confidence indicators of malicious activity. The domain was registered on May 7, 2026, through NameSilo, LLC, with an SSL certificate issued by Let's Encrypt (serial number E7). It resolves to IP address 172.67.154.188, hosted on Cloudflare's network (AS13335). VirusTotal reports 18 out of 95 security vendors flagging the domain as malicious, while Google Safe Browsing explicitly classifies it as phishing. The domain appears on one security blocklist and has been taken offline following detection by network protection systems. Users who accessed this domain should immediately reset their T-Mobile account credentials from a verified device. Enable multi-factor authentication if not already active, and review recent account activity for unauthorized transactions or configuration changes. Monitor connected email accounts and financial services for suspicious activity, as compromised credentials may be leveraged across multiple platforms. Organizations should add this domain to internal blocklists and update security awareness training to include recent phishing campaign patterns. The IP address 172.67.154.188 and SSL certificate serial E7 should be treated as indicators of compromise in network monitoring systems.