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Thyssenkrupp Marine Systems (TKMS) GmbH / Atlas Elektronik

Claimed by Thegentlemen · listed 5 days ago

5d
Age
since listed · data leaked

Status timeline

  1. ListedJun 28, 2026
  2. Data leakeddate unknown

At a glance

Group
Thegentlemen
Status
Data leaked
Country
Germany
Sector
Manufacturing
Listed on leak site
Jun 28, 2026

About the victim

AI dossier — public-source company profile

Thyssenkrupp Marine Systems (TKMS) is a German holding company and leading provider of naval vessels, submarines, and surface ships. Atlas Elektronik, founded in 1902 and headquartered in Bremen, is a subsidiary specializing in marine electronics, integrated sonar systems for submarines, and heavyweight torpedoes.

Industry
Naval Defence & Marine Electronics
Address
Bremen, Germany
Founded
1902

Attack summary

Severity: critical — Confirmed exfiltration of 1TB+ of data from a major defence contractor specializing in naval submarines and weapons systems. Defence and military technology data, particularly relating to submarine sonar and torpedoes, constitutes regulated/sensitive government-related information with direct national security implications.

The group claims to have exfiltrated approximately 1TB+ of data from TKMS and Atlas Elektronik. The leak post references multiple business entities and domain registrations but does not specify the nature of the data or whether encryption was involved.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Naval defence technical specifications
  • Submarine systems documentation
  • Sonar technology designs
  • Torpedo development files
  • Corporate records
  • Business communications

What the group claims

https://www.***.com/c/atlas-elektronik-gmbh/22289599 https://www.***.com/c/atlas-north-america-llc/346681852 https://www.***.com/c/thyssenkrupp-marine-systems/559786010 www.atlas-elektronik.com na.atlas-elektronik.com https://www.tkmsgroup.com/atlas-elektronik/ ThyssenKrupp Marine Systems of Germany (often abbreviated TKMS) is a group and holding company of providers of naval vessels, surface ships and submarines. It was founded when large industrial conglomerate ThyssenKrupp acquired Howaldtswerke-Deutsche Werft on January 5, 2005 TKMS Group is a leading provider of integrated system solutions in maritime defense technologies, catering to the complex requirements of modern navies. The company specializes in surface vessels, submarines, and advan Atlas Elektronik, founded in 1902 and headquartered in Bremen, Germany, is a marine electronics and systems business. It is involved in the development of integrated sonar systems for submarines and heavyweight torpedoes. 1TB+

Sources

Source

Indexed 5 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.

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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 559 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 1, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

  • June 28, 2026Thyssenkrupp Marine Systems (TKMS) GmbH / Atlas Elektronik listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 559 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 3,678 disclosures indexed across all operators we track. Geographically, Thyssenkrupp Marine Systems (TKMS) GmbH / Atlas Elektronik is reported in Germany, a country with 378 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Thyssenkrupp Marine Systems (TKMS) GmbH / Atlas Elektronik 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-Bund (Germany), as required for your jurisdiction.
  • 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.