Disclosure context

About sinobi

Based on the limited publicly available information, Sinobi appears to be a recently emerged ransomware operation first observed in July 2025, with financial motivations evidenced by their targeting of 268 victims across multiple sectors. The group's origin and specific affiliations remain undocumented in public threat intelligence reporting, and there is no confirmed information regarding whether they operate as a Ransomware-as-a-Service model or as an independent entity. Their attack methodology and technical capabilities have not been extensively documented by major security research organizations, though their targeting patterns suggest a broad opportunistic approach rather than highly selective operations. The group demonstrates a preference for targeting organizations in the United States, India, United Kingdom, Canada, and Italy, with a focus on manufacturing, healthcare, construction, and technology sectors, suggesting they may exploit common vulnerabilities across these industries rather than deploying sophisticated, sector-specific attack vectors. No major high-profile campaigns or significant law enforcement actions against Sinobi have been publicly reported by CISA, FBI, or established threat intelligence firms. Given the recent emergence timeline and lack of extensive public documentation, the group's current operational status and long-term trajectory remain unclear, though the substantial victim count suggests continued activity as of the last available reporting period. The group has been linked to 274 public disclosures across our corpus. First observed on a leak site on July 5, 2025; most recent post May 8, 2026. The operation is currently active.

Timeline of this disclosure

March 17, 2026Teco listed by sinobion the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 374 disclosures indexed across all operators we track. Geographically, Teco is reported in United States, a country with 7,392 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

Teco HVAC, LLC

listed as Teco · Claimed by sinobi · listed 2 months ago

Age

since listed · data leaked

Status timeline

Listed
Mar 17, 2026
Data leaked

At a glance

Group: sinobi
Status: Data leaked
Country: United States
Sector: Energy
Listed on leak site: Mar 17, 2026

About the victim

AI dossier — public-source company profile

Teco HVAC, LLC is a full-service HVAC and plumbing company serving the Baltimore-Washington and Northern Virginia areas. The company specializes in heating, cooling, and plumbing solutions and has operated in the region since 2002. It emphasizes prompt, reliable service with a focus on integrity and customer satisfaction.

Industry: HVAC & Plumbing Services
Founded: 2002

Attack summary

Severity: medium — Data has been published (disclosed status: data_published) indicating confirmed exfiltration, but the victim is a small regional HVAC/plumbing contractor with no indication of large-scale regulated PII, medical, financial, or critical infrastructure data; scale and sensitivity appear moderate.

The ransomware group Sinobi claims to have attacked Teco HVAC, LLC and has disclosed data publicly. The leak post indicates data has been published, though no specific data size or ransom demand was stated.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Customer records
Business operational data
Service/project files

What the group claims

Teco HVAC, LLC is a full-service HVAC and plumbing company serving the Baltimore-Washington and Northern Virginia areas. They are dedicated to providing high-quality service and customer satisfaction, specializing in heating, cooling, and plumbing solutions. The company emphasizes quick and reliable service, ensuring that clients receive prompt assistance for their HVAC and plumbing needs. With a commitment to integrity, quality, and trust, Teco HVAC has been a trusted provider in the region since 2002.

Sources

Victim sitewww.teco.com
Leak posthttp://sinobi6ftrg27d6g4sjdt65malds6cfptlnjyw52rskakqjda6uvb7yd.onion/leaks/69b9968d6387a4c9a2864509

Source

Indexed 2 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.