Incident Score: Analysis & Impact (SANASA1777544986)
The details regarding individual company incidents & reports gives you full view from every side.
Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of San Francisco Golf Club's Ransomware and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts San Francisco Golf Club Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the San Francisco Golf Club breach identified under incident ID SANASA1777544986.
The analysis begins with a detailed overview of San Francisco Golf Club's information like the linkedin page: https://www.linkedin.com/company/san-francisco-golf-club, the number of followers: 157, the industry type: Spectator Sports and the number of employees: 25 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 760 and after the incident was 621 with a difference of -139 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on San Francisco Golf Club and their customers.
California Golf Club of San Francisco (Cal Club) recently reported "Qilin Ransomware Gang Leaks Sensitive Data from San Francisco’s Elite Cal Club", a noteworthy cybersecurity incident.
The Qilin ransomware operation has exposed nearly 12,000 files containing highly sensitive data from the California Golf Club of San Francisco (Cal Club), an exclusive private club frequented by Silicon Valley executives and high-profile members.
The disruption is felt across the environment, and exposing Nearly 12,000 files, with nearly Nearly 12,000 files records at risk.
Formal response steps have not been shared publicly yet.
Overall, the incident is a reminder of why proactive monitoring and strong governance matter.
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating breach includes documents spanning December 2016 to September 2025 and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating qilin ransomware gang likely used compromised credentials. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate to high confidence (70%), supported by evidence indicating qilin ransomware operation has exposed nearly 12,000 files. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with moderate confidence (60%), supported by evidence indicating employee performance evaluations, 401K details, and salary records leaked. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating names, birthdates, phone numbers, home/email addresses compromised and Data from Information Repositories (T1213) with moderate to high confidence (70%), supported by evidence indicating nearly 12,000 files containing highly sensitive data exposed. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating data exfiltration such as Yes in ransomware section. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate to high confidence (80%), supported by evidence indicating qilin ransomware gang responsible for the attack and Defacement: Internal Defacement (T1491.001) with moderate confidence (50%), supported by evidence indicating attack threatening the organization’s existence. Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate confidence (60%), supported by evidence indicating qilin ransomware operation known for evasion tactics. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- San Francisco Golf Club Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/san-francisco-golf-club/incident/SANASA1777544986
- San Francisco Golf Club CyberSecurity Rating page: https://www.rankiteo.com/company/san-francisco-golf-club
- San Francisco Golf Club Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/sanasa1777544986-asahi-group-holdings-california-golf-club-of-san-francisco-ransomware-december-2016/
- San Francisco Golf Club CyberSecurity Score History: https://www.rankiteo.com/company/san-francisco-golf-club/history
- San Francisco Golf Club CyberSecurity Incident Source: https://www.scworld.com/brief/san-franciscos-cal-club-purportedly-hacked-by-qilin-ransomware
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf