Was Grupo MARSAN hit by ransomware?

Grupo MARSAN was listed by the thegentlemen ransomware operation (Mexico), 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 thegentlemen ransomware group?

thegentlemen 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 Grupo MARSAN breach?

thegentlemen published data attributed to Grupo MARSAN. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Grupo MARSAN

Claimed by Thegentlemen · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedSep 26, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Mexico
Sector: Manufacturing
Listed on leak site: Sep 26, 2026

About the victim

AI dossier — public-source company profile

Grupo Marsan is a Tier 2 automotive supplier founded in 1951 in Vigo, Spain, specializing in cataphoresis (e-coating), powder and liquid painting, metal stamping, assembly, and JIT logistics. Operating plants in Spain, Portugal, and Mexico with a capacity of 300,000 parts per day, the company serves major OEMs and Tier 1 suppliers under IATF standards. As of 2025, following recapitalization and the acquisition of KATA Aragón, the group employs approximately 500 people with annual revenue exceeding €28 million.

Industry: Automotive Tier 2 Supplier — Industrial Surface Coatings & Metal Stamping
Address: Vigo, Spain (headquarters); additional plants in Zaragoza (Spain), Portugal, and Mexico
Employees: 500
Founded: 1951

Attack summary

Severity: low — No proof files, screenshots, or operational impact are documented in the leak post. Data type and extent are unspecified. Disclosure status is marked 'data_published' but no inventory of sensitive data is evident.

The threat actor 'thegentlemen' claims to have compromised Grupo Marsan and published data. The leak post does not specify whether encryption, exfiltration, or both occurred, nor does it detail what data was obtained or published.

low

What the group claims

grupomarsan.com zoominfo.com/c/grupo-marsan/460771135 Grupo Marsan is a Spanish Tier 2 automotive supplier founded in 1951 in Vigo, Spain, specializing in industrial surface coatings — cataphoresis (e-coating), powder and liquid painting — plus metal stamping, assembly, and JIT logistics, with a capacity of 300,000 parts per day. The company operates plants in Spain (Vigo, Zaragoza), Portugal, and Mexico, and also builds and runs dedicated in-house coating lines inside clients' facilities, supported by its own technology center M-Tech. It works under IATF automotive quality standards within supply chains of major OEMs and Tier 1 suppliers. After a liquidity crisis in 2024, the group was recapitalized with private and Galician public funds (~47.5% held by Xesgalicia and Vigo Activo), and Marcos Oubiña was appointed CEO. FY2024 revenue exceeded €28 million with ~450 employees, and in 2025 the company acquired KATA Aragón, growing to ~500 employees

Sources

Victim sitegrupomarsan.com

Source

Indexed 4 hours 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 889 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post September 26, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

September 26, 2026Grupo MARSAN listed by thegentlemen on the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 889 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,696 disclosures indexed across all operators we track. Geographically, Grupo MARSAN is reported in Mexico, a country with 71 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Grupo MARSAN 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-MX (Mexico), as required for your jurisdiction.
Monitor for the data appearing on thegentlemen'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.