mainnet-standx[.]com

The domain mainnet-standx.com was registered on November 20, 2025 through Name SRS AB and is currently listed as taken offline. Infrastructure analysis shows the domain resolves to the IPv6 address 2606:4700:3037::6815:7df, which belongs to AS13335 Cloudflare, Inc. in the United States. Both authoritative nameservers, kami.ns.cloudflare.com and matteo.ns.cloudflare.com, are Cloudflare‑operated, indicating the attacker leveraged the provider’s CDN and DNS services. No SSL certificate is presented for the domain, and the sole HTTP response observed returns the page title "Just a moment...", a common Cloudflare challenge page rather than a site‑specific login interface.

The domain is flagged on one external security blocklist and is explicitly blocked by PhishDestroy, confirming that security‑focused aggregators have identified it as malicious. VirusTotal analysis shows that 2 of 95 scanned security vendors flagged the domain, providing limited but corroborating vendor detection. The threat is categorized as a brand‑impersonation campaign targeting x.com and is described as a social‑media phishing operation.

While the observed data confirms the domain’s malicious intent, the low vendor detection count and the offline status leave uncertainty regarding the current activity level or any residual payloads. Defenders should continue to block mainnet-standx.com at network perimeter, update DNS filtering rules, and monitor for any new sub‑domains or similar Cloudflare‑hosted domains that attempt to impersonate x.com. Ongoing vigilance is recommended, especially for social‑media authentication flows that could be targeted by copycat campaigns.