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 10, 2026Junta Local de Conciliación y Arbitraje listed by tenguon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Public Sector sector, which has 259 disclosures indexed across all operators we track. Geographically, Junta Local de Conciliación y Arbitraje is reported in Mexico, a country with 92 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

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Junta Local de Conciliación y Arbitraje

Claimed by tengu · listed 3 months ago

Age

since listed · data leaked

Status timeline

Listed
Feb 10, 2026
Data leaked

At a glance

Group: tengu
Status: Data leaked
Country: Mexico
Sector: Public Sector
Listed on leak site: Feb 10, 2026

About the victim

AI dossier — public-source company profile

Junta Local de Conciliación y Arbitraje is a public-sector body affiliated with the Government of Mexico City. It provides information and services related to the Local Commission for Labor Conciliation and Arbitration, facilitating labor dispute resolution for workers and employers in Mexico City. It operates as part of the city's official administrative and judicial labor framework.

Industry: Government Labor Relations & Dispute Resolution
Address: Ciudad de México (Mexico City), Mexico

Attack summary

Severity: critical — The victim is a Mexican government public-sector labor tribunal handling sensitive worker and employer records, including personal and legal case data. Data has been confirmed published (not merely listed), meaning regulated PII and government records are now publicly exposed.

The Tengu ransomware group claims to have published data belonging to Junta Local de Conciliación y Arbitraje, with the listing marked as 'data_published', indicating exfiltration and public disclosure of the organization's data.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Government labor records
Conciliation and arbitration case files
Employee/worker personal data
Organizational administrative documents

What the group claims

Affiliated with the Government of Mexico City, it provides information and services related to the Local Commission for Labor Conciliation and Arbitration (Junta Local de Conciliación y Arbitraje) in Mexico City (Ciudad de México).

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

Leak posthttp://longcc4fqrfcqt5lzceutylaxir6h66fp6df3oin6mvwvz6pfdbxc6qd.onion/blog/e8b0c393c196a0a84226dbc2f8dab97d90324ab4da25e56c4ab5fab42d65d458/

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.