Was K Subsea Group hit by ransomware?

K Subsea Group was listed by the Everest ransomware operation (United Kingdom), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Everest ransomware group?

Everest is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the K Subsea Group breach?

Everest published data attributed to K Subsea Group. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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K Subsea Group

Claimed by Everest · listed 2 months ago

Age

since listed · data leaked

Status timeline

ListedApr 13, 2026
Data leakeddate unknown

At a glance

Group: Everest
Status: Data leaked
Country: United Kingdom
Sector: Energy
Listed on leak site: Apr 13, 2026

About the victim

AI dossier — public-source company profile

K Subsea Group is a UK-based company operating in the subsea and offshore energy sector, providing specialist engineering and operational services to the oil and gas industry. The company's name suggests a focus on subsea project delivery, inspection, maintenance, and repair (IMR) or related offshore services. Specific operational scale details are not available from the provided data.

Industry: Subsea Engineering & Offshore Energy Services
Employees: 51-200

Attack summary

Severity: high — The disclosure status is 'data_published', indicating confirmed exfiltration and public release of company data. K Subsea operates in the offshore energy sector, meaning stolen data likely includes sensitive engineering, operational, and personnel information with potential implications for critical energy infrastructure.

The Everest ransomware group claims responsibility for an attack on K Subsea Group, with the disclosure status indicating data has been published. The truncated leak post does not specify the exact nature of the data exfiltrated or whether encryption was also involved.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business documents
Engineering/operational data
Employee records
Financial records

Original description

AI-summarised, not from the leak post

K Subsea Group is a Norwegian company specialising in subsea pipeline and cable installation, inspection, repair, and maintenance services. Operating primarily in the offshore energy sector, it supports oil and gas as well as renewable energy projects. The company is based in Norway and delivers engineering and marine contracting solutions to clients across the North Sea and international offshore markets.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

Leak posthttp://ransomocmou6mnbquqz44ewosbkjk3o5qjsl3orawojexfook2j7esad.onion/news/K_Subsea_Group/

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.

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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

April 13, 2026K Subsea Group 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 375 disclosures indexed across all operators we track. Geographically, K Subsea Group is reported in United Kingdom, a country with 309 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Everest means K Subsea Group 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.
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.