Disclosure context

About Medusa

Medusa, also known as MedusaLocker, is a financially motivated ransomware group that emerged in November 2022 and has since compromised 568 known victims across multiple countries. The group's origin and specific affiliations remain unclear from publicly available intelligence, though their operational patterns suggest they function as an independent ransomware operation rather than a documented Ransomware-as-a-Service model. Medusa primarily targets organizations in the United States, United Kingdom, Canada, Italy, and Australia, with a focus on business services, healthcare, manufacturing, and technology sectors, employing typical ransomware tactics including data encryption and likely exfiltration for double extortion purposes, though specific technical methodologies and initial access vectors have not been extensively documented in public threat intelligence reports. While the group has maintained a relatively high victim count since its emergence, detailed information about specific notable campaigns, high-profile victims, or major ransom demands has not been widely reported by major cybersecurity firms or law enforcement agencies. As of current intelligence assessments, Medusa appears to remain active in the threat landscape, continuing to target organizations across their established geographic and sectoral preferences. The group has been linked to 568 public disclosures across our corpus. First observed on a leak site on November 15, 2022; most recent post February 14, 2026. The operation is currently active.

Also tracked as: MedusaLocker.

Timeline of this disclosure

November 7, 2025Oscars Group listed by Medusaon the group's public leak site

Records: 25 Employees

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, Oscars Group 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

Oscars Group

Claimed by Medusa · listed 6 months ago

25 Employees

Records

Age

since listed · data leaked

Status timeline

Listed
Nov 7, 2025
Data leaked

At a glance

Group: Medusa
Status: Data leaked
Country: Australia
Sector: Not Found
Listed on leak site: Nov 7, 2025
Records: 25 Employees

About the victim

AI dossier — public-source company profile

Oscars Group is an Australian hospitality and entertainment company known for operating hotels, bars, and venues. The group is based in Australia and operates multiple licensed venues across the country. Limited public information is available from the leak post alone.

Industry: Hospitality & Entertainment
Employees: 1001-5000

Attack summary

Severity: high — Data has been marked as published by the Medusa group, indicating confirmed exfiltration and public release of business data from a multi-venue hospitality operator, which likely includes employee and customer PII.

Medusa ransomware group claims an attack on Oscars Group and has published data (disclosed_status: data_published), suggesting exfiltration of company data, though specific details of the data or encryption are not available from the truncated leak post.

high

What the group claims

Oscars Group is a prominent hospitality collective in New South Wales, founded in 1986 by the Gravanis brothers. The group manages an extensive portfolio of over 35 venues, including pubs, hotels, accommodation, and events centers, catering to a diverse clientele. Their offerings span various segments such as gaming, retail liquor, and residential developments. With a focus on creativity and entertainment, Oscars Group aims to deliver exceptional experiences to guests across its venues. company is headquartered in Level 6, Bayside Tower, 376 Bay Street, Brighton-Le-Sands NSW 2216, Australia. <25 Employees

The leak post

captured from the group's site

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Sources

Leak posthttp://xfv4jzckytb4g3ckwemcny3ihv4i5p4lqzdpi624cxisu35my5fwi5qd.onion/detail?id=75713650840e038d0578707308e19d2c

Source

Indexed 6 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.