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

December 8, 2025Heidelberggc 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 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

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Heidelberg Golf Club

listed as Heidelberggc · Claimed by Kairos · listed 5 months ago

Age

since listed · data leaked

Status timeline

Listed
Dec 8, 2025
Data leaked

At a glance

Group: Kairos
Status: Data leaked
Country: Australia
Sector: Not Found
Listed on leak site: Dec 8, 2025

About the victim

AI dossier — public-source company profile

Heidelberg Golf Club is a recreational sports facility located approximately 30 minutes from Melbourne's CBD in Victoria, Australia. It operates an 18-hole golf course, an 8-rink lawn bowls green, and multiple function rooms available for events and occasions. The club serves both sporting members and functions/hospitality clients.

Industry: Sports & Recreation / Golf Club
Address: Heidelberg, Victoria, Australia (approximately 30 minutes from Melbourne CBD)

Attack summary

Severity: medium — Data has been published by the group, indicating confirmed exfiltration, but the victim is a small recreational club with no indication of large-scale regulated data (e.g. medical or government). Likely contains member PII and financial data at moderate scale.

The Kairos ransomware group claims to have attacked Heidelberg Golf Club and has published data (disclosed status: data_published), suggesting exfiltration of club data; no specific data categories or ransom amount were stated in the post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Member records
Booking and event data
Financial records
Staff information

What the group claims

At Heidelberg Golf Club. We offer not only a beautiful 18 hole golf course, but also an 8 rink lawn bowls green and multiple function rooms to suit any occasion. Follow the links below to find out more. Heidelberg Golf Club is located only 30 minutes from Melbourne’s CBD. The perfect location for any occasion and one of the best golfing experiences Melbourne golf has to offer!

Source

Indexed 5 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.