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Thunderbird Country Club

listed as thunderbirdcc.org · Claimed by Eldorado · listed 2 years ago

25m
Age
since listed · data leaked

Status timeline

  1. ListedJun 6, 2024
  2. Data leakeddate unknown

At a glance

Group
Eldorado
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
Jun 6, 2024

About the victim

AI dossier — public-source company profile

Thunderbird Country Club is an elite private country club located in Rancho Mirage, California, founded over 70 years ago. The club offers golf, tennis, pickleball, wellness facilities, and social dining to a membership base of successful individuals from around the world. It is ranked 65th among the top 150 country clubs by Platinum Clubs of America.

Industry
Country Clubs & Private Golf Clubs
Address
70-737 Country Club Dr, Rancho Mirage, CA 92270

Attack summary

Severity: medium — Data published with confirmed exfiltration claimed; country club membership records may contain PII of high-net-worth individuals, but no specific sensitive data categories (financial records, health data) are confirmed in the leak post.

Eldorado claims to have compromised Thunderbird Country Club's systems. The leak post provides minimal detail on the scope of exfiltration or encryption claims.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Member records
  • Personal information
  • Contact details

What the group claims

... Tags: #Thunderbird Country Club #Country Club #Rancho Mirage

Sources

Source

Indexed 2 years ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Eldorado

Eldorado is a recently emerged ransomware group first observed in June 2024, operating with apparent financial motivations and demonstrating a relatively broad targeting approach across multiple countries and industry sectors. The group's origin and affiliations remain largely undocumented in public threat intelligence reporting, with no confirmed links to state actors or established ransomware families, though their operational patterns suggest they likely operate as an independent entity rather than a formal RaaS model. Specific technical details regarding Eldorado's initial access vectors, encryption methods, and data exfiltration capabilities have not been extensively documented in public security research, though their targeting of over 112 victims across diverse sectors including business services, technology, manufacturing, and financial services suggests they employ opportunistic attack methodologies rather than highly specialized techniques. The group has demonstrated a geographic focus primarily on the United States and Canada, with additional activity observed in Italy, UAE, and Croatia, though no specific high-profile campaigns or major ransomware incidents have been publicly attributed to this group by federal agencies or major security firms. As of current reporting, Eldorado appears to remain active with no documented law enforcement disruptions or confirmed rebranding activities, though the limited public visibility of their operations suggests they may be a smaller-scale operation compared to established ransomware families. The group has been linked to 112 public disclosures across our corpus. First observed on a leak site on June 6, 2024; most recent post January 22, 2025. The operation is currently inactive.

Also tracked as: el dorado.

Timeline of this disclosure

  • June 6, 2024thunderbirdcc.org listed by Eldoradoon the group's public leak site

Other recent disclosures by Eldorado

Eldorado has been linked to 112 public victims on Darkfield. A sample of the most recent:

See the full Eldorado dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, thunderbirdcc.org is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Eldorado means thunderbirdcc.org appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on Eldorado's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.