Disclosure context

About Sarcoma

Sarcoma is a relatively new ransomware group that emerged in October 2024, operating with apparent financial motivations and demonstrating a broad international targeting approach with at least 140 documented victims across multiple countries and industry sectors. The group's origin and affiliations remain unclear due to its recent emergence, with no publicly documented connections to established ransomware families or confirmation of whether they operate as an independent entity or through a Ransomware-as-a-Service model. Limited public information is available regarding Sarcoma's specific attack methodologies, initial access vectors, or technical capabilities, though their targeting patterns suggest opportunistic rather than highly selective victim selection across diverse industries including manufacturing, business services, agriculture and food production, and technology sectors. The group has shown a particular focus on victims in the United States while also maintaining operations against targets in Italy, Canada, Germany, and Australia, though no specific high-profile attacks or record ransom demands have been publicly documented by major security firms or law enforcement agencies. Given the group's recent emergence in late 2024, Sarcoma appears to remain active with no reported law enforcement disruptions or confirmed rebranding activities at this time. The group has been linked to 150 public disclosures across our corpus. First observed on a leak site on October 9, 2024; most recent post May 12, 2026. The operation is currently active.

Also tracked as: Sarcoma Ransomware Group.

Timeline of this disclosure

September 23, 2025Thermofin listed by Sarcomaon the group's public leak site

Data size: 2.9 TB

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Thermofin is reported in Canada, a country with 810 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

Thermofin

Claimed by Sarcoma · listed 8 months ago

2.9 TB

Data size

Age

since listed · data leaked

Status timeline

Listed
Sep 23, 2025
Data leaked

At a glance

Group: Sarcoma
Status: Data leaked
Country: Canada
Sector: Manufacturing
Listed on leak site: Sep 23, 2025
Data size: 2.9 TB

About the victim

AI dossier — public-source company profile

Thermofin GmbH is a German manufacturer specializing in innovative and high-performance cooling solutions for industrial refrigeration and air conditioning applications. Their product range includes evaporators, air coolers, heat pumps, and hybrid chillers serving commercial and industrial clients. Established in 2002, the company has expanded its production capabilities with a focus on quality management and sustainable growth.

Industry: Industrial Refrigeration & Cooling Solutions
Address: Germany
Founded: 2002

Attack summary

Severity: high — 2.9 TB of data has been confirmed exfiltrated and published, representing a significant business data breach from an industrial manufacturing company; scale and publication status elevate this beyond medium.

The Sarcoma ransomware group claims to have exfiltrated 2.9 TB of data from Thermofin GmbH, with the data published as a leak archive. No ransom amount was stated.

high

Data the group says was taken

AI dossier — extracted from the leak post

Archived company data (2.9 TB)

What the group claims

Thermofin Thermofin GmbH specializes in innovative and high-performance cooling solutions for various industries, including industrial refrigeration and air conditioning. Their product range includes evaporators, air coolers, heat pumps, and hybrid chillers, designed to cater to both commercial and industrial clients. Established in 2002, the company has continually expanded its production capabilities and invested in creating new jobs. With a commitment to quality management and technical expertise, Thermofin serves a broad customer base while maintaining a focus on sustainable growth and employee development.Geo: Germany - Leak size: 2.9 TB Archive - Contains: Files, SQL, Exchange

The leak post

captured from the group's site

Site: https://gyf.com.ar/ Industry: Business Services GEO: Argentina 
Site: www.propanelevac.ca Industry: Gas Stations, Retail GEO: Canada 
Site: www.mecmatica.it Industry: Provider of software solutions GEO: Italy 
Site: bedachungen-soellner.de Industry: Commercial & Residential Construction GEO: Germany 
Site: charterindustrial.com Industry: Industrial Machinery & Equipment GEO: USA 
Site: msbuilders.com Industry: Commercial & Residential Construction GEO: USA 
Site: thermofin.de Industry: Building Materials GEO: Germany 
Site: miamimanagement.com Industry: Business Services GEO: USA 
Site: kwg-senftenberg.de Industry: Business Services GEO: Germany 
Site: f1-generation.com Industry: Apparel & Accessories Retail GEO: Germany 
Site: inoxlaghi.com Industry: Industrial Machinery & Equipment GEO: Italy 
Site: maselli.com Industry: Manufacturing innovative optical technology GEO: Italy 
Site: metroheatingandair.com Industry: Commercial & Residential Construction GEO: USA 
Site: hv.com.co Industry: Food & Beverage GEO: Colombia 

```
Design and develop IT products and services for the financial market
```


```
Propane Levac inc. specializes in the distribution of propane across Ontari…

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.