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Don Hierro

Claimed by Thegentlemen · listed 2 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedSep 30, 2026
  2. Data leakeddate unknown

At a glance

Group
Thegentlemen
Status
Data leaked
Country
Mexico
Sector
Manufacturing
Listed on leak site
Sep 30, 2026

What the group claims

donhierro.com zoominfo.com/c/don-hierro-sl/347708573 Don Hierro Corporation, S.A. (roots to 1969, Panama City) is a Panama-based engineering, construction and manufacturing firm specializing in hydraulic works, concrete caissons, foundations and industrial building. With ISO 9001/14001/45001 certifications and 39,000 m² of production facilities in Colón (its own concrete plants, quarries and caisson yards), it self-manufactures critical components — a rare vertical integration in Central America. Its flagship client is the Panama Canal Authority (ACP), for which it has executed compensating-platform repairs, drainage works at the Espíritu Santo and Pirro locks and coastal work for the Third Bridge consortium (~$22–28M). It also builds water-supply systems (Caños de Brea, David pipeline with EMPESA), bridges, dams, breakwaters and drip-irrigation (Netafim) agriculture projects. Led by project director Javier Carrillo (34 years experience) and a team claiming 300+ cumulative

Sources

Source

Indexed 2 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 914 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post September 30, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

  • September 30, 2026Don Hierro listed by thegentlemen on the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 914 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, Don Hierro is reported in Mexico, a country with 71 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Don Hierro 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.