blue-butterfly-a450[.]vailtaatpyaixmbldelttde[.]workers[.]dev

This domain, blue-butterfly-a450.vailtaatpyaixmbldelttde.workers.dev, is flagged as a high-risk generic phishing endpoint targeting unsuspecting users. Analysis indicates no direct brand impersonation or known drainer kit signatures, suggesting a broad-spectrum credential harvesting operation. The infrastructure appears designed for rapid deployment and evasion, leveraging a subdomain under a content delivery network to obscure its origins and complicate takedown efforts. Infrastructure analysis reveals the following technical indicators: the domain is registered through a major content delivery provider and resolves to IP address 104.21.48.4, located in Canada. It was created on May 07, 2026, with a Let's Encrypt SSL certificate (serial number E8) providing HTTPS encryption. Detection engines report a VirusTotal score of 4/95, indicating limited but growing recognition of its malicious nature. The domain appears on one security blocklist and is currently not flagged by Google Safe Browsing. The registrar's infrastructure and Cloudflare hosting further complicate attribution and mitigation. As of the latest assessment, the domain remains active and continues to host phishing content. Response actions should include immediate blacklisting at the network perimeter, DNS sinkholing, and endpoint protection updates to recognize the domain and associated IP. Despite its low initial detection rate, the domain's infrastructure and evasion tactics present a persistent risk. Organizations are advised to monitor for connections to 104.21.48.4 and the domain's SSL certificate fingerprint. User awareness training should emphasize the risks of interacting with unfamiliar subdomains under content delivery networks, particularly those with generic or nonsensical naming patterns.