Was Röben Tonbaustoffe GmbH hit by ransomware?

Röben Tonbaustoffe GmbH was listed by the thegentlemen 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 thegentlemen ransomware group?

thegentlemen 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 Röben Tonbaustoffe GmbH breach?

thegentlemen published data attributed to Röben Tonbaustoffe GmbH. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Röben Tonbaustoffe GmbH

Claimed by Thegentlemen · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedJan 31, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Germany
Sector: Manufacturing
Listed on leak site: Jan 31, 2026

About the victim

AI dossier — public-source company profile

Röben Tonbaustoffe GmbH is a sixth-generation German family business and the largest private brick manufacturer in Germany. The company produces clinker bricks, roof tiles, stoneware, and facade systems, serving architects and the construction sector domestically and internationally. It is headquartered in Germany and operates under the brand Röben Klinker und Dachziegel.

Industry: Clay Building Materials & Brick Manufacturing
Employees: 201-500

Attack summary

Severity: medium — Data is listed as published, indicating exfiltration occurred, but the leak post content is inaccessible and no specific sensitive or regulated data categories (e.g., PII at scale, financial, medical) can be confirmed from available information. Business data exposure at a mid-sized manufacturer warrants medium severity in the absence of further detail.

The ransomware group 'thegentlemen' claims to have attacked Röben Tonbaustoffe GmbH, with the disclosure status listed as data_published, indicating data has been exfiltrated and released. The specific data types and volume are not detailed in the available leak post, which was inaccessible due to a bot-verification challenge.

medium

What the group claims

https://www.roeben.com https://www.zoominfo.com/c/ro%CC%88ben/430636767 Röben specializes in building ceramics, offering a wide range of products including roofing tiles, clinker bricks, and ceramic floor tiles. The company serves architects, contractors, and homeowners, providing not only products but also professional advice and inspiration for construction projects. Their offerings encompass roofing solutions, facade materials, and indoor ceramics with various colors and styles. With a commitment to quality and design, Röben aims to enhance both aesthetic and functional aspects of residential and public buildings

The leak post

captured from the group's site

Gentlecloud Protection 🛡️ Gentlecloud Verifying your browser... Initializing security checks... I'm not a bot

Sources

Victim sitewww.roeben.com
Leak posthttp://tezwsse5czllksjb7cwp65rvnk4oobmzti2znn42i43bjdfd2prqqkad.onion

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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 483 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

January 31, 2026Röben Tonbaustoffe GmbH listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 483 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen 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, Röben Tonbaustoffe GmbH is reported in Germany, a country with 695 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Röben Tonbaustoffe GmbH 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 thegentlemen'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.