chubb[.]prociv-srl[.]sbs

The domain chubb.prociv-srl.sbs was registered through Dynadot LLC on December 04, 2025 and is presently taken offline. DNS resolution points to the IP address 188.114.96.3, which belongs to AS13335 Cloudflare, Inc., located in the United States. The domain is served by Cloudflare nameservers lars.ns.cloudflare.com and ullis.ns.cloudflare.com and does not present an SSL/TLS certificate, indicating an unencrypted HTTP service at the time of capture. The only visible page title returned by the web server is "Outlook Web App," which aligns with the reported brand impersonation of Microsoft.

Classification from the intelligence set identifies the activity as a tech support scam that seeks to exploit Microsoft’s brand reputation. Detection evidence shows the domain appears on a single security blocklist and has been blocked by the PhishDestroy sinkhole. Google Safe Browsing has flagged the site for social engineering, and VirusTotal reports that 16 of 93 security vendors marked the domain as malicious. No further malware or payload indicators were observed in the available data.

Uncertainty remains regarding the specific payload or victim interaction flow, as the site content beyond the title has not been captured. Analysts should therefore treat any traffic to this domain as hostile, enforce DNS sinkholing or blocklisting at the network perimeter, and monitor for similar Cloudflare‑hosted subdomains that reference Microsoft services. Continuous re‑scanning of the domain, especially if it reappears, is advised to capture any evolving tactics or additional indicators of compromise.