Skip to main content
Darkfield

Ransomware victim disclosure

← All victims

Petrobras

listed as Petrobras Campos Basin 3D & 4D Seismic Survey Data · Claimed by Everest · listed 8 months ago

7m
Age
since listed · data leaked

Status timeline

  1. ListedNov 17, 2025
  2. Data leakeddate unknown

At a glance

Group
Everest
Status
Data leaked
Country
Brazil
Sector
Energy
Listed on leak site
Nov 17, 2025

About the victim

AI dossier — public-source company profile

Petrobras (Petróleo Brasileiro S.A.) is Brazil's state-controlled multinational energy corporation and one of the largest oil and gas companies in the world. The company is a global leader in deepwater and ultra-deepwater oil exploration and production, with the Campos Basin being one of its most strategically significant offshore operating areas. Petrobras operates refineries, pipelines, and distribution networks across Brazil and internationally.

Industry
Oil & Gas Exploration & Production
Address
Avenida Henrique Valadares, 28, Rio de Janeiro, RJ 20231-030, Brazil
Employees
10000+
Founded
1953

Attack summary

Severity: critical — Seismic survey data for a major offshore basin (Campos Basin) represents highly sensitive, proprietary, and commercially valuable intellectual property belonging to a national energy company. Exfiltration and publication of 3D/4D seismic data could compromise Brazil's national energy security, expose billions of dollars in exploration intelligence, and benefit geopolitical or commercial adversaries. The data_published status confirms actual exfiltration and disclosure of regulated strategic asse

The Everest ransomware group claims to have exfiltrated Petrobras Campos Basin 3D and 4D seismic survey data and has published it (disclosed status: data_published). The compromised data reportedly relates to proprietary subsurface imaging surveys critical to oil and gas exploration strategy.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • 3D seismic survey data
  • 4D seismic survey data
  • Campos Basin subsurface imaging data
  • Oil and gas exploration datasets

Original description

AI-summarised, not from the leak post

N/A

The leak post

captured from the group's site
© 2026, All rights reserved
Citizens Bank - Database Leaked 
Evaluate a Norstella company - Database Leaked 
Studio Marchi - Studio Professionale Associato - Database Leaked 
Super AI - Database Leaked 
Complete Aircraft Group - Database Leaked 
Umiles Group - Database Leaked 
K Subsea Group - Database Leaked 
Parque Eólico Toabré - Database Leaked 
PT Brantas Abipraya - Database Leaked 
Straight Line Logistics - Database Leaked 
First Priority Group - Database Leaked 
Hyundai Elevator - Database Leaked 
UD Trucks - Database Leaked 
McDonalds India - Database Leaked 
Tsunami Tsolutions - Database Leaked 
Atlas Air: MUSE INSECURE - Database Leaked 
Iron Mountain - Database Leaked 
Hosowaka Micron Group - Database Leaked 
Shinwa Co Ltd - Database Leaked 
SIGMA Processing Group - Database Leaked 
Acu Trans Solutions LLC - Database Leaked 
GIBSIN Engineers - Database Leaked 
ASRock Rack - Database Leaked 
Reeves Information Technology - Database Leaked 
WANCHI STEEL INDUSTRIAL - Database Leaked 
GC Accounting - Database Leaked 
National Money Mart Company - Database leaked 
Virginia Records - Database Leaked 
Morgan Records Management - Database leaked 
ELC Electroconsult SpA - Databas…

Sources

Source

Indexed 8 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.

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 Everest

Everest is a financially-motivated ransomware group that emerged in September 2021, operating with a focus on profit-driven extortion campaigns against organizations primarily in the United States and Europe. The group's country of origin and specific affiliations remain undocumented in public threat intelligence reporting, though their operational patterns suggest they likely operate as an independent entity rather than a formal ransomware-as-a-service model. Limited public documentation exists regarding Everest's specific attack methodologies, initial access vectors, or technical capabilities, though their victim profile indicates they employ standard ransomware tactics targeting a diverse range of sectors including healthcare, technology, business services, and manufacturing organizations. Since their emergence, Everest has claimed responsibility for attacks against 339 victims across multiple countries, with the United States, United Kingdom, Italy, Germany, and Spain representing their primary geographic targets, though no specific high-profile incidents or major ransoms have been publicly documented by law enforcement or major security firms. As of current reporting, Everest appears to remain an active threat actor, though the limited public intelligence available suggests they operate as a lower-tier ransomware group compared to more prominent and well-documented criminal organizations. The group has been linked to 369 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 29, 2026. The operation is currently active.

Timeline of this disclosure

  • November 17, 2025Petrobras Campos Basin 3D & 4D Seismic Survey Data listed by Evereston the group's public leak site

Other recent disclosures by Everest

Everest has been linked to 369 public victims on Darkfield. A sample of the most recent:

See the full Everest dossier →

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 652 disclosures indexed across all operators we track. Geographically, Petrobras Campos Basin 3D & 4D Seismic Survey Data is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Everest means Petrobras Campos Basin 3D & 4D Seismic Survey Data 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.br (Brazil), as required for your jurisdiction.
  • Monitor for the data appearing on Everest'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.