Disclosure context

About tengu

Tengu is a recently emerged ransomware group first observed in October 2025, operating with apparent financial motivations and demonstrating a geographically diverse targeting approach across 49 documented victims. The group has primarily focused their operations on Morocco, the United States, India, Italy, and Indonesia, suggesting either opportunistic targeting or specific interest in these regions' economic sectors. Their victim profile spans multiple industries including technology, manufacturing, public sector, and agriculture and food production, indicating a broad targeting strategy rather than sector-specific focus. Due to the group's recent emergence and limited public documentation from established threat intelligence sources, specific details regarding their origin, affiliation status, technical methodology, encryption techniques, and operational structure remain largely undocumented by major cybersecurity agencies and research organizations. No notable high-profile campaigns or law enforcement actions have been publicly reported by CISA, FBI, or prominent security researchers at this time. The group's current operational status appears active given their recent emergence, though comprehensive threat intelligence profiles from established sources have yet to be published due to their nascent presence in the ransomware landscape. The group has been linked to 57 public disclosures across our corpus. First observed on a leak site on October 23, 2025; most recent post May 21, 2026. The operation is currently active.

Timeline of this disclosure

February 25, 2026martec.it listed by tenguon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,524 disclosures indexed across all operators we track. Geographically, martec.it is reported in Italy, a country with 496 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

← All victims

Martec Marine

listed as martec.it · Claimed by tengu · listed 3 months ago

Age

since listed · data leaked

Status timeline

Listed
Feb 25, 2026
Data leaked

At a glance

Group: tengu
Status: Data leaked
Country: Italy
Sector: Technology
Listed on leak site: Feb 25, 2026

About the victim

AI dossier — public-source company profile

Martec Marine is an Italian privately owned company, active since 1994, specializing in defense and integrated safety solutions for Navy vessels, cruise ships, and mega yachts. The company designs and develops damage control systems, fire detection systems, emergency shutdown systems, and related software packages. More than 12 Navy ships and over 80 cruise liners and mega yachts have Martec Damage Control Systems installed.

Industry: Defense & Marine Safety Systems
Founded: 1994

Attack summary

Severity: critical — Martec Marine operates in the defense sector, supplying safety and damage control systems to Navy ships, cruise liners, and mega yachts. Exfiltration and publication of data from a defense-adjacent maritime safety company carries significant national security and operational risk, qualifying as critical under regulated/sensitive defense data exposure.

The Tengu ransomware group claims to have published data exfiltrated from Martec Marine, with the disclosure status listed as 'data_published', indicating stolen data has been released. No specific data volume or encryption details are stated in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Defense and safety system design data
Naval and maritime client records
Software package documentation
Corporate business data

What the group claims

MARTEC MARINE is part of an Italian privately owned Group active in the Defense and Integrated Safety solutions for Navy, Cruise ships and Mega Yachts since 1994.From the early beginning of its activities Martec has deeply invested in the design and development of safety systems, being awarded, at present, as one of the most skilled companies in an international context, in this field.More than 12 Navy ships and more than 80 Cruise liners and Mega Yachts have Martec Damage Control Systems installed.Product range vary from hardware (Damage Control Systems, Electronic Incident Board, Fire Detection System, Emergency Shutdown System, Automatic Fire Sensing and Suppression System) to software packages (Damage Control, Decision Support, On Board Stability, Personnel Tracking, Security and Technical Patrol Management, Injured Treatment).Innovation, Integration and Flexibility are the key words for MARTEC: development of new solutions based on customer requirements, integration with third par

The leak post

captured from the group's site

Shisa Ransomware Blog Shisa RANSOMWARE DATA LEAKS BLOG HOME AFFILIATE PROGRAM CONTACT crown-security.com.tw PUBLISHED Crown Security is a technology company specializing in information security and digital systems, offering advanced solutions to protect corporate networks and data from breaches and cyberattacks The company focuses on providing security consulting and implementing integrated protection systems tailored to each organization's needs 27,470 👁 Sileno Companies Inc PUBLISHED Sileno Companies Inc. A US company primarily operating in the hospitality and real estate sectors, its activities include: Hotel operation Property management Management of hotels' restaurants and bars Hospitality project development 22.9TB was encrypted in 14 hours on 3/5/2026 More than 67.07 GB was extracted 29,787 👁 Eos Technology srl PUBLISHED Eos Technology srl is a company with 15 years of experience in the ICT sector, initially starting as an assembly and repair laboratory for PCs and peripherals. Over time, it has developed expertise that has allowed it to become a partner of various international brands. The company offers a range of services including IT assistance, multimedia services, h…

Sources

Source

Indexed 3 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.