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Expert E-commerce GmbH

Claimed by Medusa · listed 11 months ago

114 GB
Data size
10m
Age
since listed · data leaked

Status timeline

  1. ListedAug 20, 2025
  2. Data leakeddate unknown

At a glance

Group
Medusa
Status
Data leaked
Country
Germany
Sector
Technology
Listed on leak site
Aug 20, 2025
Data size
114 GB

About the victim

AI dossier — public-source company profile

Expert E-commerce GmbH operates expert.de, a major German consumer electronics retailer offering a wide range of products including TVs, audio equipment, computers, smartphones, smart home devices, and household appliances via both physical stores and an online shop. The company is part of the Expert retail group, one of Germany's largest electronics retail chains. It serves consumers across Germany through a network of local stores and a comprehensive e-commerce platform.

Industry
Consumer Electronics Retail & E-commerce
Employees
1001-5000

Attack summary

Severity: high — 114 GB of confirmed exfiltrated data from a large German e-commerce and retail operator, with data already published. Likely includes customer PII and business-sensitive records at scale, though specific data categories are not enumerated in the (blocked) leak post.

The Medusa ransomware group claims to have exfiltrated approximately 114 GB of data from Expert E-commerce GmbH and has published the data. No ransom amount was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Business data (114 GB exfiltrated)
  • Potentially customer records
  • Potentially employee records
  • Potentially financial/transactional data
  • Internal company documents

What the group claims

Expert E-commerce GmbH is a company specializes in E-commerce Services. It offers services that provide the participating specialist stores of the expert group (Expert SE) via online support. The company was formed in 1999 and is based in Langenhagen, Germany. The total amount of data leakage is 114 GB

The leak post

captured from the group's site
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Sources

Source

Indexed 11 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 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

  • August 20, 2025Expert E-commerce GmbH listed by Medusaon the group's public leak site
Data size
114 GB

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

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, Expert E-commerce GmbH is reported in Germany, a country with 926 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Medusa means Expert E-commerce GmbH 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-Bund (Germany), 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.