Was Bumfords hit by ransomware?

Bumfords was listed by the Medusa 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 Medusa ransomware group?

Medusa 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 Bumfords breach?

Medusa published data attributed to Bumfords. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Bumfords

Claimed by Medusa · listed 1 year ago

13m

Age

since listed · data leaked

Status timeline

ListedJun 9, 2025
Data leakeddate unknown

At a glance

Group: Medusa
Status: Data leaked
Country: United Kingdom
Listed on leak site: Jun 9, 2025

About the victim

AI dossier — public-source company profile

Bumfords is a heating and plumbing services company established in 1968, based in South Yorkshire. They specialize in boiler installation, underfloor heating, bathroom installations, air conditioning, and servicing for residential customers across South Yorkshire and Derbyshire, and are a Worcester Bosch accredited installer.

Industry: Heating & Plumbing Services
Address: Unit 2D Shortwood Business Park, Shortwood Court, Hoyland, Barnsley, South Yorkshire, S74 9LH
Founded: 1968

Attack summary

Severity: low — No proof files, screenshots, or specific data inventory are described in the available excerpt. The post contains only company information and a listing announcement without demonstrated evidence of exfiltration or operational impact.

The Medusa group claims to have compromised Bumfords and published data from the company. The specific nature of the breach (encryption, exfiltration, or both) and the extent of data exposure are not detailed in the available post excerpt.

low

What the group claims

Bumfords has been delivering reliable and competitive heating and plumbing solutions since 1968, specializing in services such as boiler installation, underfloor heating, and bathroom installations. The company prides itself on professionalism, honesty, and integrity while catering primarily to homeowners across South Yorkshire and Derbyshire. They also offer additional services including air conditioning, servicing and repairs, and boiler finance options. As a Worcester Bosch accredited installer, Bumfords emphasizes energy efficiency and customer satisfaction. Bumford's corporate office is located at Unit 2D Shortwood Business Park, Shortwood Court, Hoyland, Barnsley, South Yorkshire, S74 9LH.

Sources

Leak posthttp://xfv4jzckytb4g3ckwemcny3ihv4i5p4lqzdpi624cxisu35my5fwi5qd.onion/detail?id=5ab20aa1b669cd00813eecbdbaf91036

Source

Indexed 1 year 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 Medusa

Medusa, also known as MedusaLocker, is a financially motivated ransomware group that emerged in November 2022 and has since compromised 568 known victims across multiple countries. The group's origin and specific affiliations remain unclear from publicly available intelligence, though their operational patterns suggest they function as an independent ransomware operation rather than a documented Ransomware-as-a-Service model. Medusa primarily targets organizations in the United States, United Kingdom, Canada, Italy, and Australia, with a focus on business services, healthcare, manufacturing, and technology sectors, employing typical ransomware tactics including data encryption and likely exfiltration for double extortion purposes, though specific technical methodologies and initial access vectors have not been extensively documented in public threat intelligence reports. While the group has maintained a relatively high victim count since its emergence, detailed information about specific notable campaigns, high-profile victims, or major ransom demands has not been widely reported by major cybersecurity firms or law enforcement agencies. As of current intelligence assessments, Medusa appears to remain active in the threat landscape, continuing to target organizations across their established geographic and sectoral preferences. The group has been linked to 635 public disclosures across our corpus. First observed on a leak site on November 15, 2022; most recent post May 5, 2026. The operation is currently active.

Also tracked as: MedusaLocker, MEDUSA LOCKER.

Timeline of this disclosure

June 9, 2025Bumfords listed by Medusaon the group's public leak site

Other recent disclosures by Medusa

Medusa has been linked to 635 public victims on Darkfield. A sample of the most recent:

See the full Medusa dossier →

Sector and geography

Geographically, Bumfords is reported in United Kingdom, a country with 1,217 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Medusa means Bumfords 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, NCSC (United Kingdom), as required for your jurisdiction.
Monitor for the data appearing on Medusa'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.