Was Jacquet Weston Engineering hit by ransomware?

Jacquet Weston Engineering 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 Jacquet Weston Engineering breach?

Sarcoma published data attributed to Jacquet Weston Engineering (~106 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Jacquet Weston Engineering

Claimed by Sarcoma · listed 1 year ago

106 GB

Data size

18m

Age

since listed · data leaked

Status timeline

ListedJan 20, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: United Kingdom
Sector: Manufacturing
Listed on leak site: Jan 20, 2025
Data size: 106 GB

About the victim

AI dossier — public-source company profile

Jacquet Weston Engineering is a private limited company established in 1973 specializing in the design and manufacture of plant and ancillary equipment for the surface finishing industry. Operating from a purpose-built 20,000 sq ft facility in Berkshire since 1997, the family business employs 20 highly skilled staff and serves customers in aerospace, automotive, rail, defence and general engineering sectors.

Industry: Industrial Equipment Manufacturing & Surface Finishing Solutions
Address: Tower Works, Membury Airfield, Ramsbury Road, Lambourn, Hungerford, Berks RG17 7TJ, United Kingdom
Employees: 20
Founded: 1973

Attack summary

Severity: high — Confirmed exfiltration of 106 GB including database and file archives from a manufacturing company serving defence and aerospace sectors; likely contains sensitive technical designs, customer data, and operational information. Large data volume and regulated sector exposure (defence/aerospace) elevates risk despite no ransom stated.

Sarcoma claims to have exfiltrated 106 GB of data from Jacquet Weston Engineering's systems. The leak post indicates the archive contains files and SQL databases, with data published without ransom demand.

high

Data the group says was taken

AI dossier — extracted from the leak post

SQL databases
Design files and CAD models
Customer records
Business documentation
Project files

What the group claims

Jacquet Weston Engineering Jacquet Weston Engineering (JWE) was established in 1973 & is a Private Limited Company, we are market leaders in the Design and Manufacture of plant and ancillary equipment for the surface finishing industry. JWE is a family business with twenty highly skilled employees covering many disciplines, JWE have been based in a new purpose built 20,000 ft² factory on a 1¼ acre site at Lambourn, Membury, near Newbury, Berkshire since 1997. This specialist facility incorporates Workshop, Stores and Offices. The new industry focused factory provides considerable advantages including the significant ability for JWE to pre-assemble and test dry run all plants for client inspection prior to delivery, and ongoing stock supply and management.Geo: United Kingdom - Leak size: 106 GB Archive - Contains: Files, SQL

Sources

Victim sitejweltd.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

January 20, 2025Jacquet Weston Engineering listed by Sarcomaon the group's public leak site

Data size: 106 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, Jacquet Weston Engineering 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 Jacquet Weston Engineering 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.