Hanzestrohm listed on Inc Ransom leak site

• Ransomware group: Inc Ransom
• Country: Netherlands
• Sector: Manufacturing
• Announcement date: September 14, 2025

Inc Ransom claims data breach against Hanzestrohm

The Inc Ransom ransomware group has listed data it claims belongs to the Dutch manufacturing company Hanzestrohm on its leak platform. This announcement, posted on a leak site, suggests that the organization has been targeted in a cyberattack. The group has linked the listing to an incident they claim occurred on April 23, 2024.

Ransomware leak sites are platforms used by cybercriminal groups to pressure victims into paying ransoms. These groups often employ a strategy known as double extortion. In this tactic, attackers do not just encrypt a company's files to disrupt operations; they also steal sensitive information before the encryption occurs. The threat of leaking this stolen data publicly serves as additional leverage to force the victim to meet the ransom demands.

Details of the claimed incident

According to the announcement made by the Inc Ransom group, the data listed on their platform is associated with an event that allegedly took place in April 2024. The group's post includes information regarding the company's technical brand portfolio and its specific areas of operation. This information provides a glimpse into the company's business structure and technical identity, though it does not provide a granular view of the internal systems involved.

Regarding the specific content of the breach, no specific details regarding the nature of the leaked or threatened data have been provided. The available information, such as screenshots from the leak site, only displays the company's general profile information rather than specific files or databases.

About Hanzestrohm

Hanzestrohm is a Dutch family-owned business that provides specialist products and services in the fields of building, industrial, and infrastructure solutions. Founded in 1951, the company operates with approximately 140 employees from its offices located in Zwolle, Alphen aan den Rijn, and Zwijndrecht.

Potential impact and risks

This situation may create a negative impact on the company's operational continuity and could lead to the exposure of sensitive data belonging to employees or customers. Because the company is based in the Netherlands, the incident may trigger legal and administrative sanctions under the European Union's General Data Protection Regulation (GDPR).

The use of double extortion tactics by the Inc Ransom group may increase secondary risks such as identity theft and targeted phishing attacks following the publication of the data. Furthermore, an indirect security risk may be observed for the company's supply chain partners, who may be targeted due to their professional connections to the affected organization.

For organizations operating in the manufacturing sector, maintaining robust security postures is critical to preventing such incidents. Common defensive steps include implementing multi-factor authentication across all remote access points, maintaining regular and offline backups of critical data, and conducting regular employee training to recognize phishing attempts. Additionally, monitoring for unauthorized access and maintaining strict network segmentation can help limit the lateral movement of attackers within a corporate environment.