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

March 29, 2026Söllner GmbH & Co. KG listed by Sarcomaon the group's public leak site

Data size: 286 GB

Sector and geography

This disclosure adds to ransomware activity in the Commercial & Residential Construction sector. Geographically, Söllner GmbH & Co. KG is reported in Germany, a country with 695 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

Söllner GmbH & Co. KG

Claimed by Sarcoma · listed 2 months ago

286 GB

Data size

53d

Age

since listed · data leaked

Status timeline

Listed
Mar 29, 2026
Data leaked

At a glance

Group: Sarcoma
Status: Data leaked
Country: Germany
Sector: Commercial & Residential Construction
Listed on leak site: Mar 29, 2026
Data size: 286 GB

About the victim

AI dossier — public-source company profile

Söllner GmbH & Co. KG is a family-owned roofing and construction company based in Plettenberg, Sauerland, Germany, operating since 1902 and now in its fourth generation. The company specialises in roofing, carpentry (Zimmerei), facade construction, scaffolding, and ancillary services including container hire and crane/aerial-platform rental. It serves industrial, commercial, public, and private clients both regionally and nationally, and has recently added an architecture division offering end-to-end design and execution.

Industry: Roofing & Construction Services
Address: Grafweg 35 a, 58840 Plettenberg, Germany
Founded: 1902

Attack summary

Severity: high — 286 GB of data has been confirmed exfiltrated and published, likely containing business-sensitive records, employee PII, and client data for a multi-generational SME; while not at the scale of regulated healthcare or defence data, the confirmed publication of a substantial archive elevates this beyond medium.

The Sarcoma ransomware group claims to have exfiltrated 286 GB of data from Söllner GmbH & Co. KG and has published the data. No ransom figure was stated and the disclosure status is listed as data_published.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company business records
Project/reference documentation
Employee data
Client/contractor correspondence
Financial records
Architectural and construction plans

What the group claims

Data from family-owned roofing company with 286 GB archive

The leak post

captured from the group's site

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 

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Propane Levac inc. specializes in the distribution of propane across Ontario and Quebec, offering a range of services tailored for residential, commercial, and agricultural needs

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MecMatica is focused on developing…

Sources

Victim sitebedachungen-soellner.de
Leak posthttp://sarcomawmawlhov7o5mdhz4eszxxlkyaoiyiy2b5iwxnds2dmb4jakad.onion

Source

Indexed 2 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.