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

May 15, 2026Sileno Companies Inc. listed by tenguon the group's public leak site

Data size: 22.9TB encrypted; more than 67.07 GB extracted

Sector and geography

This disclosure adds to ransomware activity in the Hospitality / Real Estate sector. Geographically, Sileno Companies Inc. is reported in US, a country with 2,713 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

Sileno Companies Inc.

Claimed by tengu · listed 6 days ago

22.9TB encrypted; more than 67.07 GB extracted

Data size

Age

since listed · listed for ransom

Status timeline

Listed
May 15, 2026

Current state: Listed for ransom

At a glance

Group: tengu
Status: Listed for ransom
Country: US
Sector: Hospitality / Real Estate
Listed on leak site: May 15, 2026
Data size: 22.9TB encrypted; more than 67.07 GB extracted

About the victim

AI dossier — public-source company profile

Sileno Companies Inc. is a US-based company operating primarily in the hospitality and real estate sectors. Its activities include hotel operation, property management, management of hotels' restaurants and bars, and hospitality project development. No further details about its scale or headquarters location are publicly available from this post.

Industry: Hospitality & Real Estate

Attack summary

Severity: high — The group claims both large-scale encryption (22.9 TB) and confirmed exfiltration (67.07 GB) of business data from a hospitality and real estate operator, which likely includes guest PII, financial records, and operational data, constituting significant confirmed data exfiltration.

The Tengu ransomware group claims to have encrypted 22.9 TB of data within 14 hours on 3 May 2026 and to have exfiltrated more than 67.07 GB of data from Sileno Companies Inc.

high

Data the group says was taken

AI dossier — extracted from the leak post

Encrypted corporate data (22.9 TB)
Exfiltrated files (67.07 GB)
Hotel operations data
Property management records
Restaurant and bar management data
Hospitality project development records

What the group claims

A US company primarily operating in the hospitality and real estate sectors, with activities including hotel operation, property management, management of hotels' restaurants and bars, and hospitality project development.

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 6 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.