coinbase-bitcoin-com-57192[.]castillo-samantha1991[.]workers[.]dev

This domain, coinbase-bitcoin-com-57192.castillo-samantha1991.workers.dev, is flagged as an elevated-risk brand impersonation threat targeting Coinbase. The domain was registered through Cloudflare, Inc. and created on February 21, 2026. It currently resolves to the IP address 172.67.189.136, which is located in the United States under Cloudflare, Inc.'s ASN (AS13335). The site has been taken offline, and as of the report date (July 24, 2026), it returns an HTTP status code 403, indicating that access is forbidden.

Analysis indicates the domain uses HSTS and HTTP/3 technologies, which are typically employed to enhance security but can also be used by threat actors to mask malicious activities. The SSL certificate is issued by Google Trust Services / WE1. The domain appears on three security blocklists, including PhishDestroy, MetaMask, and SEAL, which suggests it has been actively involved in malicious activities. Gridinsoft's trust score for this domain is 0/100, indicating a high level of distrust.

While 8 of 93 security vendors on VirusTotal have flagged this domain, the exact nature of the threat is not fully understood without further analysis. Defenders should be cautious and monitor for any reactivation of this domain, as it has the potential to be used in future crypto scams. Additionally, it is recommended to block this domain in network configurations and educate users about the risks of visiting untrusted Coinbase-related websites.