Don Hierro listed on thegentlemen leak site

• Ransomware group: thegentlemen
• Country: Mexico
• Sector: Manufacturing
• Announcement date: September 30, 2026

Thegentlemen claims a breach of Don Hierro

The engineering and manufacturing firm Don Hierro has been listed on a leak site by the threat actor group known as thegentlemen. The announcement, which appeared on September 30, 2026, suggests that the organization has been targeted in a cyberattack aimed at data exfiltration.

According to the claims made by the threat actor group, they successfully compromised Don Hierro's systems on September 29, 2026. The group has asserted that they have obtained access to the company's internal systems and has expressed an intention to publish the acquired data. At this stage, information regarding the specific identity, tactics, or background of the group known as thegentlemen remains limited.

Details regarding the claimed data

Despite the listing on the leak site, the announcement provides very little concrete information regarding the specifics of the incident. There are no details provided in the leak announcement regarding the nature of the data, and no screenshot is available to verify the contents of the alleged breach. Furthermore, the group has not disclosed the total size of the data or the specific file count involved in the incident.

The listing names no specific data types that have been compromised.

About Don Hierro

Don Hierro is a Panama-based engineering, construction, and manufacturing firm. The company specializes in a wide range of technical services, including hydraulic works, concrete caissons, foundations, and industrial buildings. The firm is involved in large-scale infrastructure projects, such as those for the Panama Canal Authority. Operating with a vertically integrated structure, the company maintains its own production facilities to support its diverse engineering and construction operations.

Potential impact and security considerations

This claim may pose risks to the company's operational continuity and commercial reputation. Given that Don Hierro is a Panama-based engineering firm, the leaked data could potentially include technical documents or tender information related to critical infrastructure projects. Such an exposure could impact the company's professional relationships with strategic partners, such as the Panama Canal Authority.

Furthermore, the exposure of employee personal data could facilitate targeted phishing attacks against the workforce. In modern ransomware scenarios, threat actors often employ a double-extortion strategy. This method involves both encrypting a victim's systems and stealing sensitive data to use as leverage. If a group employs this strategy, the possibility of data being published or sold in the event of non-payment must be considered a significant risk.

For organizations operating in the manufacturing and engineering sectors, maintaining robust security postures is essential. Common defensive steps for organizations facing such threats include implementing multi-factor authentication, maintaining offline backups, and conducting regular security awareness training to mitigate the risk of phishing. Protecting technical documentation and tender information is particularly vital for firms involved in critical infrastructure to maintain trust with state and private partners.