Disclosure context

About Kairos

Kairos is a recently emerged ransomware group first observed in November 2024 that appears to be primarily financially motivated, having targeted approximately 75 victims across multiple sectors and countries. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, and it is unknown whether they operate as a Ransomware-as-a-Service model or as an independent entity. Based on available targeting data, Kairos appears to focus their operations primarily on English-speaking countries including the United States, Australia, United Kingdom, and Canada, with additional activity observed in Germany, while their sector targeting spans education, healthcare, agriculture and food production, and business services, though specific attack methodologies, initial access vectors, and encryption techniques have not been publicly documented by major security organizations. Given the group's recent emergence in late 2024, there are no widely reported notable campaigns or high-profile incidents documented by CISA, FBI, or established security research firms. As of current reporting, Kairos appears to remain active based on their recent first observation date, though comprehensive threat intelligence profiles from major security organizations have not yet been published due to the group's nascent operational timeline. The group has been linked to 86 public disclosures across our corpus. First observed on a leak site on November 13, 2024; most recent post May 15, 2026. The operation is currently active.

Timeline of this disclosure

September 18, 2025heidelberggc.com.au/Australia/26.4GB listed by Kairoson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, heidelberggc.com.au/Australia/26.4GB is reported in Australia, a country with 368 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

← All victims

Heidelberg Golf Club

listed as heidelberggc.com.au/Australia/26.4GB · Claimed by Kairos · listed 8 months ago

Age

since listed · data leaked

Status timeline

Listed
Sep 18, 2025
Data leaked

At a glance

Group: Kairos
Status: Data leaked
Country: Australia
Sector: Not Found
Listed on leak site: Sep 18, 2025

About the victim

AI dossier — public-source company profile

Heidelberg Golf Club is a private golf club located in Heidelberg, Victoria, Australia. The club provides golf course facilities and associated membership services to its members. It operates as a recreational sporting organisation typical of suburban Australian golf clubs.

Industry: Sports & Recreation (Golf Club)
Address: Heidelberg, Victoria, Australia

Attack summary

Severity: high — 26.4 GB of data has reportedly been published, indicating confirmed exfiltration at meaningful scale. Member PII, financial records, and club administration data are likely included, representing significant data exposure for individuals associated with the club.

The Kairos ransomware group claims to have exfiltrated approximately 26.4 GB of data from Heidelberg Golf Club, with the data published in a disclosed leak post, suggesting exfiltration and public release of stolen files.

high

Data the group says was taken

AI dossier — extracted from the leak post

Member records
Financial documents
Administrative files
Staff information
Operational records

What the group claims

Unknown - Heidelberg Golf Club

Sources

Source

Indexed 8 months 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.