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Rio Marine

Claimed by Sarcoma · listed 1 year ago

166 GB
Data size
15m
Age
since listed · data leaked

Status timeline

  1. ListedMar 22, 2025
  2. Data leakeddate unknown

At a glance

Group
Sarcoma
Status
Data leaked
Country
United States
Sector
Transportation/Logistics
Listed on leak site
Mar 22, 2025
Data size
166 GB

About the victim

AI dossier — public-source company profile

Rio Marine is a comprehensive marine industry service provider founded in 1929 (originally as Glynn Electric), serving the Gulf Coast with expertise in vessel and barge maintenance, electrical systems, hydraulics, electronics, and power management. The company operates multiple divisions across locations ranging from Corpus Christi, TX to Mobile, AL, with a primary office in Channelview, Houston, and employs over 150 technicians.

Industry
Marine Services & Maintenance
Address
15934 East Freeway, Channelview, TX 77530, United States
Employees
150
Founded
1929

Attack summary

Severity: high — Confirmed exfiltration of 166 GB of data from a company with significant operational footprint serving critical marine infrastructure. Data type not fully specified but scale and operational context suggest business-critical information exposure.

Sarcoma ransomware group claims to have exfiltrated 166 GB of data from Rio Marine. The leak post does not explicitly state whether encryption occurred, but data has been published as proof of the breach.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Company operational records
  • Historical business documents
  • Service records
  • Client/contract information
  • Internal systems data

What the group claims

Our History and Growth Ronald Dansby, with his many years of experience in the marine industry, quickly sought to make Rio achieve its greatest potential. Expanding and improving the quality of the services provided was the first step to getting Rio where it is today. Rio now has experienced technicians to help in the fields of electrical devices and general problems, barge and engine maintenance, audio gauging of barge hulls, and controls and hydraulics. Our superior service and our many office locations have made Rio a very recognized and respected service company that has served faithfully since 1929. Company Timeline 1929 to 2023 1929 Founding of Glynn Electric Originally Glynn Electric, Rio Marine was founded back in 1929 by Leo Glynn. 2002 Business sold to Ronald Dansby With his many years of experience in the marine industry, Ronald Dansby quickly sought to make Rio achieve its greatest potential. Expanding and improving the quality of the services provided was the first step to getting Rio where it is today. 2000s Rio Expansion Rio Marine has not only expanded its services, but also the locations. Offices are now located along the Gulf Coast, ranging from Corpus Christi, TX to Mobile, AL. The scattered locations provide Rio with a distinct advantage in its timely services, allowing a swift response to almost anywhere along the Gulf Coast. 2023 Rio Marine adds new divisions to broaden our service capabilities: Rio Marine Rio Controls & Hydraulics Rio Electronics Rio Power Management New Houston Office Rio moves into new updated Houston office in Channelview to better serve our clients.Geo: USA - Leak size: 166 GB Archive - Contains: Files

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 Sarcoma

Sarcoma is a relatively new ransomware group that emerged in October 2024, operating with apparent financial motivations and demonstrating a broad international targeting approach with at least 140 documented victims across multiple countries and industry sectors. The group's origin and affiliations remain unclear due to its recent emergence, with no publicly documented connections to established ransomware families or confirmation of whether they operate as an independent entity or through a Ransomware-as-a-Service model. Limited public information is available regarding Sarcoma's specific attack methodologies, initial access vectors, or technical capabilities, though their targeting patterns suggest opportunistic rather than highly selective victim selection across diverse industries including manufacturing, business services, agriculture and food production, and technology sectors. The group has shown a particular focus on victims in the United States while also maintaining operations against targets in Italy, Canada, Germany, and Australia, though no specific high-profile attacks or record ransom demands have been publicly documented by major security firms or law enforcement agencies. Given the group's recent emergence in late 2024, Sarcoma appears to remain active with no reported law enforcement disruptions or confirmed rebranding activities at this time. The group has been linked to 150 public disclosures across our corpus. First observed on a leak site on October 9, 2024; most recent post May 12, 2026. The operation is currently active.

Also tracked as: Sarcoma Ransomware Group.

Timeline of this disclosure

  • March 22, 2025Rio Marine listed by Sarcomaon the group's public leak site
Data size
166 GB

Other recent disclosures by Sarcoma

Sarcoma has been linked to 150 public victims on Darkfield. A sample of the most recent:

See the full Sarcoma dossier →

Sector and geography

This disclosure adds to ransomware activity in the Transportation/Logistics sector, which has 1,081 disclosures indexed across all operators we track. Geographically, Rio Marine is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Rio Marine 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 Sarcoma'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.