Was Martin Energy Group Services hit by ransomware?

Martin Energy Group Services was listed by the Medusa ransomware operation (United States), 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 Martin Energy Group Services breach?

Medusa published data attributed to Martin Energy Group Services (~320.90 GB), around 120 employees records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Martin Energy Group Services

Claimed by Medusa · listed 1 year ago

320.90 GB

Data size

120 employees records

16m

Age

since listed · data leaked

Status timeline

ListedFeb 22, 2025
Data leakeddate unknown

At a glance

Group: Medusa
Status: Data leaked
Country: United States
Sector: Energy
Listed on leak site: Feb 22, 2025
Data size: 320.90 GB
Records: 120 employees

About the victim

AI dossier — public-source company profile

Martin Energy Group Services is a complete solutions provider specializing in generator packages, combined heat and power (CHP) systems, microgrids, anaerobic digesters, and battery energy storage systems. The company offers design, engineering, installation, and 24/7 remote monitoring services across multiple sectors including agriculture, healthcare, mining, and data centers, with offices across the United States and internationally.

Industry: Energy Systems & Power Generation
Address: 39415 Excelsior Dr, Latham, Missouri 65050, United States
Employees: 120

Attack summary

Severity: high — Confirmed exfiltration of 320.90 GB from a critical infrastructure service provider (energy systems, microgrids, CHP). The scale and sector (energy) indicate significant business and potentially sensitive project data; risk to operational technology systems and client networks is material.

Medusa claims to have exfiltrated 320.90 GB of data from Martin Energy Group Services. The post does not specify the nature of the data or whether encryption was deployed.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business records
Project data
Engineering documents
Client information

What the group claims

Martin Energy Group Services are a complete solutions provider for generator packages, combined heat and power (CHP) systems, microgrids, and anaerobic digester design & construction. Martin Energy Group Services corporate office is located in 39415 Excelsior Dr, Latham, Missouri, 65050, United States and has 120 employees. The total amount of data leakage is 320.90 GB

Sources

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

February 22, 2025Martin Energy Group Services listed by Medusaon the group's public leak site

Data size: 320.90 GB
Records: 120 employees

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 Energy sector, which has 652 disclosures indexed across all operators we track. Geographically, Martin Energy Group Services is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Medusa means Martin Energy Group Services 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, CISA (United States), 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.