Disclosure context

About medusalocker

MedusaLocker is a ransomware group that emerged in November 2022, operating with primarily financial motivations and targeting organizations across multiple sectors including technology, energy, healthcare, and manufacturing. The group's origin and specific affiliations remain largely undocumented in public threat intelligence reports, though their operational patterns suggest they may operate as part of the broader ransomware-as-a-service ecosystem that has proliferated in recent years. With 51 documented victims primarily concentrated in the United States, United Arab Emirates, Germany, Canada, and Antigua and Barbuda, MedusaLocker appears to focus on opportunistic targeting rather than specific geographic or sectoral specialization. The group's attack methodology and specific technical capabilities have not been extensively documented by major threat intelligence organizations, though their targeting of critical infrastructure sectors including healthcare and energy suggests they likely employ common ransomware tactics such as network encryption and potential data exfiltration. No major high-profile attacks or significant law enforcement disruptions against MedusaLocker have been publicly reported by CISA, FBI, or other major security agencies. The current operational status of MedusaLocker remains unclear due to limited public documentation, though the relatively recent emergence date suggests the group may still be active or have transitioned to other operations. The group has been linked to 67 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.

Timeline of this disclosure

September 14, 2025usenergy listed by medusalockeron the group's public leak site

Ransom demanded: $120000

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 374 disclosures indexed across all operators we track. Geographically, usenergy is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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usenergy

Claimed by medusalocker · listed 8 months ago

$120000

Ransom

demanded

Age

since listed · data leaked

Status timeline

Listed
Sep 14, 2025
Data leaked

At a glance

Group: medusalocker
Status: Data leaked
Country: United States
Sector: Energy
Listed on leak site: Sep 14, 2025
Ransom demanded: $120000

About the victim

AI dossier — public-source company profile

usenergy appears to be a US-based energy sector company. Beyond the victim name and country designation, no public site content or additional identifying details are available to further characterise the organisation's activities or scale.

Industry: Energy

Attack summary

Severity: medium — Data is stated as published/for sale by the group, indicating exfiltration, but no proof files, data size, or specific sensitive data categories (e.g. PII, SCADA, financial records) are described in the post, limiting severity assessment. The energy sector context raises concern but cannot confirm critical-infrastructure impact without further evidence.

Medusa Locker claims to have exfiltrated data from the victim and is offering it for sale at $120,000, with the post suggesting the buyer will receive options for monetising the files.

medium

What the group claims

Price-$120000 (sale in one hand there are options for making a profit from these files will be included in the deal)

Sources

Leak posthttp://z6wkgghtoawog5noty5nxulmmt2zs7c3yvwr22v4czbffdoly2kl4uad.onion/?p=419

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.