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Threat IntelligenceOct 7, 2026

Attackers Hijack .gh, .sl, and .as Registries to Obtain Certificates for Google Domains

Attackers hijacked .gh, .sl, and .as domain registries to obtain unauthorized HTTPS certificates for Google domains.

Attackers compromised the domain registries for Ghana (.gh), Sierra Leone (.sl), and American Samoa (.as) to obtain unauthorized HTTPS certificates for Google and YouTube domains. While Google's own systems were not breached, these certificates could have allowed attackers to impersonate legitimate sites over encrypted connections. Google blocked the unauthorized certificates via CRLSets and worked with certificate authorities to revoke them, mitigating the risk.

AI summary of the linked source. Not reviewed by an editor. How this works

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The lesson from this incident

Full lesson

Attackers compromised the administrative infrastructure of three country-code top-level domain (ccTLD) registries, exploiting weaknesses in registry access controls and DNS management to fraudulently obtain HTTPS certificates for high-profile domains owned by Google. This attack demonstrates that the certificate trust model is only as strong as the weakest DNS authority in the chain — a compromised registry can undermine the integrity of encrypted communications globally. Because HTTPS certificates are widely trusted by browsers by default, end users would have had no visual warning that they were connecting to an impersonator. Google's rapid response using CRLSets and coordinated certificate revocation limited real-world harm, but the window of exposure highlights how critical timely detection and revocation mechanisms are. Organizations cannot rely solely on certificate issuance controls; they must actively monitor for unauthorized certificates referencing their domains.

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Indicators of Compromise

Extracted by AI from the linked source. Not reviewed by an editor. How this works

  • domain — google.com.gh
  • domain — google.sl
  • domain — google.as
  • domain — youtube.com.gh
  • domain — google.com.sl
  • domain — www.google.com.sl
  • domain — www.google.sl
  • domain — www.youtube.sl
  • domain — youtube.sl
  • domain — www.google.as
  • domain — youtube.as

Entities

Google (vendor)Google Domains (product)YouTube (product)Chrome (product)Let's Encrypt (product)ZeroSSL (product)