Was werkstoff-service.de hit by ransomware?

werkstoff-service.de was listed by the m3rx ransomware operation (Germany), 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 m3rx ransomware group?

m3rx 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 werkstoff-service.de breach?

m3rx published data attributed to werkstoff-service.de. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

W.S. Werkstoff Service GmbH

listed as werkstoff-service.de · Claimed by M3Rx · listed 2 days ago

Age

since listed · data leaked

Status timeline

ListedJun 11, 2026
Data leakeddate unknown

At a glance

Group: M3Rx
Status: Data leaked
Country: Germany
Sector: Manufacturing
Listed on leak site: Jun 11, 2026

About the victim

AI dossier — public-source company profile

W.S. Werkstoff Service GmbH is a material engineering company based in Essen, Germany, specializing in accredited material testing, damage analysis, non-destructive testing, and professional training. The company serves multiple industries with particular focus on the railway sector, offering services from laboratory testing to forensic materials analysis and certified retraining programs.

Industry: Material Engineering & Testing Services
Address: Essen, Germany

Attack summary

Severity: high — Confirmed exfiltration of 1.82 TB (1.7M+ files) from a materials testing and railway-sector service provider. Data likely includes client proprietary information, test results, and operational data. Railway sector involvement suggests potential critical infrastructure relevance.

The m3rx group claims to have exfiltrated 1.82 TB of data comprising 1,719,610 files from the company. The post indicates data publication but does not specify the exact nature of stolen data or confirm encryption.

high

Data the group says was taken

AI dossier — extracted from the leak post

Technical test reports and analysis data
Client/customer information
Training program records
Operational business documents
Inspection and certification records

What the group claims

+49 2013168440. W.S. Werkstoff Service GmbH specializes in material engineering, offering a range of services including material testing, damage analysis, and professional training in material technology. Their expert team, consisting of chemists, physicists, and engineers, provides accredited inspection services and consulting for various industries, particularly in the railway sector. The company is located in Essen, Germany, and serves clients globally with a focus on high-quality standards and innovative solutions. They also offer certified retraining and qualification programs in material testing and non-destructive testing Stolen: 1.82 TB. 1,719,610 Files

Sources

Victim sitewerkstoff-service.de
Leak posthttp://4k6plf4h2cm2nco6ae3inrsxnmqgl6lllmwefydhnlcq4tuhwbj4qpad.onion#werkstoff-service.de

Source

Indexed 2 days 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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About m3rx

Based on the limited publicly available information, m3rx is an emerging ransomware group first observed in April 2026 with a relatively small victim count of eight organizations, suggesting they are either a newly formed operation or a smaller-scale criminal enterprise focused on financial gain. The group's origin and affiliations remain unclear, with no documented evidence from major security vendors or law enforcement agencies regarding their geographical base, operational structure, or whether they operate as an independent cell or as part of a larger ransomware-as-a-service ecosystem. Their attack methodology and specific technical capabilities have not been extensively documented by established threat intelligence sources, though their targeting pattern indicates a preference for English-speaking nations including Great Britain, Australia, and the United States, as well as operations in Switzerland and Italy, with victims spanning consumer services, business services, technology, and healthcare sectors. No major campaigns, high-profile victims, or significant ransoms have been publicly reported by CISA, FBI, Mandiant, or other reputable security researchers, likely due to the group's recent emergence and limited scope of operations. Given their recent first observation date and small victim count, m3rx appears to be in early operational stages with their current activity status and long-term viability remaining uncertain. The group has been linked to 26 public disclosures across our corpus. First observed on a leak site on April 29, 2026; most recent post June 11, 2026. The operation is currently active.

Timeline of this disclosure

June 11, 2026werkstoff-service.de listed by m3rxon the group's public leak site

Other recent disclosures by m3rx

m3rx has been linked to 26 public victims on Darkfield. A sample of the most recent:

See the full m3rx dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, werkstoff-service.de is reported in Germany, a country with 334 ransomware disclosures in our corpus.

If your organisation is affected

A listing by m3rx means werkstoff-service.de 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.
Monitor for the data appearing on m3rx'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.