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Söllner GmbH & Co. KG

Claimed by Sarcoma · listed 4 months ago

286 GB
Data size
3m
Age
since listed · data leaked

Status timeline

  1. ListedMar 29, 2026
  2. Data leakeddate unknown

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 

```
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

Source

Indexed 4 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.

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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

Other recent disclosures by Sarcoma

Sarcoma has been linked to 150 public victims on Darkfield. A sample of the most recent:

See the full Sarcoma dossier →

Sector and geography

This disclosure adds to ransomware activity in the Commercial & Residential Construction sector, which has 2 disclosures indexed across all operators we track. Geographically, Söllner GmbH & Co. KG is reported in Germany, a country with 926 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Söllner GmbH & Co. KG appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, CERT-Bund (Germany), as required for your jurisdiction.
  • Monitor for the data appearing on Sarcoma's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.