yubico-app[.]com

Analysis of the domain yubico-app.com, registered through Dynadot Inc, indicates active brand impersonation targeting Cloudflare. The domain resolves to the IP address 188.114.96.3, which is geolocated in Canada and associated with Cloudflare, Inc. Nameservers are configured as damian.ns.cloudflare.com and yolanda.ns.cloudflare.com, suggesting an attempt to mimic legitimate Cloudflare infrastructure. The SSL certificate is issued by Google Trust Services (WE1), a common provider for both legitimate and malicious domains, offering no definitive indication of intent. The domain is currently active, returning an HTTP 403 status with the page title 'Suspected Malware | Cloudflare,' which aligns with known patterns of brand impersonation. It appears on one security blocklist and is flagged by PhishDestroy. As of the latest scan, 17 out of 91 security vendors on VirusTotal detect this domain as malicious. The scam type is explicitly classified as brand impersonation, with Cloudflare identified as the targeted brand. Defenders should note that while the domain exhibits multiple indicators of malicious activity, its association with Cloudflare’s IP range may complicate network-based blocking. The use of Cloudflare nameservers and a Cloudflare-hosted IP suggests an effort to blend into expected traffic patterns. No evidence of a phishing kit or specific payload is currently available, and the exact content served by the domain remains unconfirmed. Organizations are advised to block the domain at the DNS or proxy level and monitor for related infrastructure using the same nameserver or IP patterns. Further investigation into the registration details and historical DNS records may provide additional context for takedown efforts.