Ransomware Group: QILIN

VICTIM NAME: California Golf Club of San Francisco

NOTE: No files or stolen information are [exfiltrated/downloaded/taken/hosted/seen/reposted/disclosed] by RedPacket Security. Any legal issues relating to the content of the files should be directed at the attackers directly, not RedPacket Security. This blog is simply posting an editorial news post informing that a company has fallen victim to a ransomware attack. RedPacket Security is in no way affiliated or aligned with any ransomware threat actors or groups and will not host infringing content. The information on this page is fully automated and redacted whilst being scraped directly from the QILIN Onion Dark Web Tor Blog page.

AI Generated Summary of the Ransomware Leak Page

California Golf Club of San Francisco is identified as the victim in a ransomware leak post attributed to the Qilin group. The club is a United States–based private golf club with a long history, established in 1918, and occupying roughly a 425-acre site after relocating from Ingleside in 1924. The leak post is dated October 5, 2025; since no explicit compromise date is provided, this date is treated as the post date. The page frames the incident as a data-leak event associated with ransomware and notes the presence of a claim URL, but it does not specify any ransom amount. The description context highlights the club’s background within the hospitality sector, without naming other organizations besides the victim.

Observables on the leak page show no images or downloadable content (images_count = 0, downloads_present = false). The only notable artifact is the claim URL supplied by the attackers, which typically serves as a pointer to a statement or data release. With no embedded screenshots or documents, the page presents limited internal content for review beyond the victim’s basic profile and the claim indicator. Attribution to the Qilin group is the clearest context available from the provided data.

CTI takeaway: While the page does not disclose a specific encryption status or a ransom amount, its classification as a ransomware leak post signals risk to hospitality venues like private clubs. Incident responders should validate whether California Golf Club of San Francisco experienced data exfiltration, review access controls and backups, and monitor for any later disclosures via threat intel feeds or the leak site. Given the lack of attached material on the page, corroboration with additional sources is recommended before taking formal remediation or notification actions.