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 56 public disclosures across our corpus. First observed on a leak site on October 23, 2025; most recent post May 20, 2026. The operation is currently active.

Timeline of this disclosure

May 18, 2026MARTEC MARINE listed by tenguon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Defense / Marine Safety sector. Geographically, MARTEC MARINE 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

Claimed by tengu · listed 3 days ago

Age

since listed · listed for ransom

Status timeline

Listed
May 18, 2026

Current state: Listed for ransom

At a glance

Group: tengu
Status: Listed for ransom
Country: Italy
Sector: Defense / Marine Safety
Listed on leak site: May 18, 2026

About the victim

AI dossier — public-source company profile

MARTEC MARINE is part of an Italian privately owned group active in defense and integrated safety solutions for Navy vessels, cruise ships, and mega yachts since 1994. The company designs and develops safety systems including Damage Control Systems, Fire Detection Systems, Emergency Shutdown Systems, and related software packages such as Decision Support, Personnel Tracking, and On Board Stability. 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: high — MARTEC MARINE operates in the defense and naval safety sector, supplying critical safety systems to Navy ships and large vessels. Any exfiltration of technical or design data related to defense systems carries significant national security and operational risk, placing this at high severity even without confirmed data volume figures.

The Tengu ransomware group has listed MARTEC MARINE as a victim, claiming the company's data has been disclosed. No specific data volume, encryption details, or exfiltration quantities are stated for this victim in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Defense system design documents
Naval safety system data
Software package source or configuration files
Client/vessel installation records
Corporate business data

What the group claims

Part of an Italian privately owned Group active in Defense and Integrated Safety solutions for Navy, Cruise ships and Mega Yachts since 1994. Products include Damage Control Systems, Electronic Incident Board, Fire Detection System, Emergency Shutdown System, and software packages.

The leak post

captured from the group's site

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 
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 
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, help desk support, corporate security systems, and the design of virtual switchboards and video surveillance systems. Eos Technology srl aims to provide consulting services to clients navigating th…

Sources

Leak posthttp://longcc4fqrfcqt5lzceutylaxir6h66fp6df3oin6mvwvz6pfdbxc6qd.onion

Source

Indexed 3 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.