Was Structure-flex hit by ransomware?

Structure-flex was listed by the Sarcoma ransomware operation (United Kingdom), 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 Structure-flex breach?

Sarcoma published data attributed to Structure-flex (~139 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Structure-flex

Claimed by Sarcoma · listed 1 year ago

139 GB

Data size

15m

Age

since listed · data leaked

Status timeline

ListedMar 22, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: United Kingdom
Sector: Manufacturing
Listed on leak site: Mar 22, 2025
Data size: 139 GB

About the victim

AI dossier — public-source company profile

Structure-flex is a UK-based manufacturer specializing in flexible thermoplastic-coated technical textiles and high-frequency welding products. Founded in 1970, the company produces lorry tension curtains, bulk packaging bags, proof test bags, air lift bags, and wide-format digital printing services from a 50,000 sq ft facility in Norfolk. With over 50 years of experience, it serves the commercial transport, industrial, and digital print markets.

Industry: Flexible Thermoplastic Products Manufacturing & Industrial Textiles
Address: 33 Holt Road, Cromer, Norfolk, NR27 9EB, United Kingdom
Employees: 51-200
Founded: 1970

Attack summary

Severity: high — Confirmed exfiltration of 139 GB of business data from an established manufacturing company with likely customer, operational, and proprietary technical information at risk. Data published on leak site indicates operational impact and exposure of sensitive business records.

Sarcoma claims to have exfiltrated 139 GB of data from Structure-flex. The group has published the data archive and listed the victim on their leak site, indicating confirmed data theft.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business files
Operational records
Technical documentation
Customer information
Internal communications

What the group claims

A family-owned business, Structure-flex has specialised in the use of PVC and high-frequency fabric welding technology to manufacture innovative solutions for over 46 years. In 1970, the company brought to market the innovative “Big Bag” for the oil and gas industry - a resilient PVC bulk bag built to contain large volumes of dry or liquid produce. Since then, the company has evolved to undertake challenges in a range of industries to become a leading manufacturer of high quality tension lorry curtains, since the product was first invented. The company has continued to provide an increasing range of innovative technical products for the commercial vehicle industry as well as wide-format digital printing, proof load test bags for weight-bearing equipment such as cranes, and air lift bags for the diving industry. With innovation and high quality at the heart of every product, entire projects are undertaken in-house from concept/development to the final product to provide end-to-end tailor-made solutions.Geo: UK - Leak size: 139 GB Archive - Contains: Files

Sources

Victim sitestructure-flex.co.uk

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

March 22, 2025Structure-flex listed by Sarcomaon the group's public leak site

Data size: 139 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 Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, Structure-flex is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Structure-flex 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, NCSC (United Kingdom), 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.