Skip to main content
Darkfield

Ransomware victim disclosure

← All victims

OTEIS Conseil & Ingénierie

Claimed by Coinbasecartel · listed 1 day ago

1d
Age
since listed · data leaked

Status timeline

  1. ListedAug 22, 2026
  2. Data leakeddate unknown

At a glance

Group
Coinbasecartel
Status
Data leaked
Country
France
Sector
Professional Services
Listed on leak site
Aug 22, 2026

About the victim

AI dossier — public-source company profile

OTEIS Conseil & Ingénierie is a French multidisciplinary engineering and consulting firm headquartered in Bois-Colombes. The company specializes in building design, water infrastructure, urban development, industrial processes, and environmental expertise across public and private sectors, serving clients throughout project lifecycles.

Industry
Engineering & Consulting — Building, Infrastructure & Environmental Design
Address
15-17 Rue Raoul Nordling, 92270 Bois-Colombes, France

Attack summary

Severity: medium — Data has been published and disclosed status confirmed, but no proof files, screenshots, or specific sensitive data categories (PII at scale, financial records, etc.) are described in the post. Exfiltration is implied but unsubstantiated.

The coinbasecartel group claims to have accessed and exfiltrated data from OTEIS. No specific details on encryption, operational disruption, or data categories are stated in the leak post.

medium

Original description

AI-summarised, not from the leak post

OTEIS Conseil & Ingénierie is a French engineering and consulting firm specializing in building and infrastructure design. Operating in France, the company provides technical expertise across disciplines including structural engineering, fluids, electricity, and project management. It serves sectors such as real estate, public works, and urban development, supporting both public and private clients throughout project lifecycle phases.

Sources

Source

Indexed 1 day 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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About coinbasecartel

CoinbaseCartel is a ransomware group that emerged in September 2025 with financially motivated operations targeting organizations across multiple sectors and geographic regions. The group has demonstrated significant activity in a short timeframe, compromising at least 102 known victims primarily across the United States, United Arab Emirates, Germany, Canada, and Brazil. Their targeting patterns show a preference for technology companies, financial services organizations, manufacturing entities, and consumer services businesses, suggesting an opportunistic approach focused on organizations likely to have both valuable data and the financial resources to pay ransoms. Given the group's recent emergence and limited public documentation from established threat intelligence sources, details regarding their specific attack methodologies, infrastructure, and organizational structure remain largely unconfirmed by major cybersecurity firms or law enforcement agencies. The group appears to maintain active operations as of late 2025, though comprehensive analysis of their tactics, techniques, and procedures awaits further investigation and reporting by established threat intelligence organizations. The group has been linked to 219 public disclosures across our corpus. First observed on a leak site on September 15, 2025; most recent post August 23, 2026. The operation is currently active.

Also tracked as: coinbase cartel.

Timeline of this disclosure

  • August 22, 2026OTEIS Conseil & Ingénierie listed by coinbasecartelon the group's public leak site

Other recent disclosures by coinbasecartel

coinbasecartel has been linked to 219 public victims on Darkfield. A sample of the most recent:

See the full coinbasecartel dossier →

Sector and geography

This disclosure adds to ransomware activity in the Professional Services sector, which has 14 disclosures indexed across all operators we track. Geographically, OTEIS Conseil & Ingénierie is reported in France, a country with 242 ransomware disclosures in our corpus.

If your organisation is affected

A listing by coinbasecartel means OTEIS Conseil & Ingénierie 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 coinbasecartel'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.