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ETS PUZIO

listed as puzio-saunierduval.fr · Claimed by LockBit · listed 7 months ago

6m
Age
since listed · data leaked

Status timeline

  1. ListedDec 26, 2025
  2. Data leakeddate unknown

At a glance

Group
LockBit
Status
Data leaked
Country
France
Listed on leak site
Dec 26, 2025

About the victim

AI dossier — public-source company profile

ETS PUZIO is a small, independent heating specialist based in Chelles, France, operating since 1973. The company specialises in the installation, commissioning, maintenance, and after-sales service of individual gas boilers and related heating systems. It holds Saunier Duval 'Partenaire Fil Rouge' accreditation and serves customers within a 30 km radius of Chelles.

Industry
Heating & HVAC Installation and Maintenance
Address
28 rue du Valengelier, 77500 Chelles, France
Employees
1-10
Founded
1973

Attack summary

Severity: medium — Data has been published by LockBit, confirming exfiltration, but the victim is a very small local trades business with limited scale of sensitive regulated data; no evidence of large-scale PII, medical, or financial data at critical volume.

LockBit claims to have attacked ETS PUZIO and the disclosed status indicates data has been published, suggesting exfiltration and/or encryption of company data. No ransom amount or specific data volume was stated in the post.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Customer contact records
  • Service and maintenance contracts
  • Business correspondence
  • Financial/invoicing records
  • Employee information

What the group claims

Notre entreprise ETS PUZIO à CHELLES Chauffagiste à Chelles depuis 1973, nous sommes spécialiste de...

Sources

Source

Indexed 7 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.

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Disclosure context

About LockBit

LockBit is a highly prolific ransomware group that emerged in October 2020 and has become one of the most active ransomware operations globally, with over 3,500 documented victims and a primary motivation of financial gain through extortion. The group is suspected to originate from Russia and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while providing them with ransomware tools, infrastructure, and support. LockBit primarily gains initial access through exploiting vulnerabilities in public-facing applications, credential stuffing attacks, and phishing campaigns, employing double extortion tactics where they steal sensitive data before encrypting systems and threatening to leak the information if ransom demands are not met. The group has demonstrated significant technical sophistication, developing multiple variants including LockBit 3.0 (also known as LockBit Black), and has been particularly active in targeting business services, manufacturing, technology, and healthcare sectors across the United States, France, Germany, United Kingdom, and Italy. Despite ongoing law enforcement efforts and international cooperation to disrupt their operations, including seizures of infrastructure and arrests of affiliates, LockBit has shown resilience and adaptability, continuing to operate and evolve their tactics while maintaining their position as one of the most dominant ransomware threats in the cybercriminal landscape. The group has been linked to 3,536 public disclosures across our corpus. First observed on a leak site on October 21, 2020; most recent post March 30, 2026. The operation is currently active.

Also tracked as: LockBit 3.0, LockBit Black, LockBit Green, ABCD ransomware.

Timeline of this disclosure

  • December 26, 2025puzio-saunierduval.fr listed by LockBiton the group's public leak site

Other recent disclosures by LockBit

LockBit has been linked to 3,536 public victims on Darkfield. A sample of the most recent:

See the full LockBit dossier →

Sector and geography

Geographically, puzio-saunierduval.fr is reported in France, a country with 612 ransomware disclosures in our corpus.

If your organisation is affected

A listing by LockBit means puzio-saunierduval.fr appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, CERT-FR (France), as required for your jurisdiction.
  • Monitor for the data appearing on LockBit's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.