Was Decoline hit by ransomware?

Decoline was listed by the Sarcoma ransomware operation (Belgium), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Sarcoma ransomware group?

Sarcoma is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Decoline breach?

Sarcoma published data attributed to Decoline (~85 GB), around 45 employees records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Decoline

Claimed by Sarcoma · listed 1 year ago

85 GB

Data size

45 employees records

14m

Age

since listed · data leaked

Status timeline

ListedMay 4, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: Belgium
Sector: Business Services
Listed on leak site: May 4, 2025
Data size: 85 GB
Records: 45 employees

About the victim

AI dossier — public-source company profile

Decoline is a Belgian manufacturer and distributor of curtain-hanging systems and professional window decoration solutions, founded in 1990 and headquartered in Pelt. With over 45 employees, the company generates more than 70% of revenue from proprietary product development and holds a leading position in the European window decoration market. The company has been owned by investment group Renardmont since end of 2019.

Industry: Window Decoration & Curtain Systems Manufacturing
Address: Lieven Gevaertlaan 10, B-3900 Pelt, Belgium
Employees: 45
Founded: 1990

Attack summary

Severity: high — Confirmed exfiltration of 85 GB of data from an operational manufacturing company; likely includes customer data, proprietary product designs, and financial information. Data is publicly published with no apparent ransom negotiation, indicating intent to damage business operations and reputation.

Sarcoma claims to have exfiltrated 85 GB of data from Decoline. The group has published the data archive without stating specific ransom demands or operational disruption details.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business files
Product development documents
Customer records
Financial records
Internal communications

What the group claims

Decoline Since 1990, Decoline has been active as a producer and distributor of user-friendly, high-quality curtain-hanging systems. Unique and complete professional window decoration solutions are also part of its assortment. Thanks to constant product and service innovations, and because of its top-class quality standards, the company is a leading player in the window decoration market. At the end of 2019, the company was taken over by investment group Renardmont. This enabled Decoline to pursue its independent course, and to continue to focus on innovation and growth. With a team of more than 45 employees, Decoline realises more than 70% of its sales from its own developments, operating from its headquarters in Pelt (Belgium).Geo: Belgium - Leak size: 85 GB Archive - Contains: Files

Sources

Victim sitedecoline.com

Source

Indexed 1 year 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

May 4, 2025Decoline listed by Sarcomaon the group's public leak site

Data size: 85 GB
Records: 45 employees

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 Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Decoline is reported in Belgium, a country with 90 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Decoline 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.be (Belgium), 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.