RansomHub ransomware group lists verwarmingheyndrickx.be on its leak site

• Ransomware group: RansomHub
• Country: Belgium
• Sector: Professional Services
• Announcement date: July 30, 2024

RansomHub claims data breach at Verwarming Heyndrickx

The RansomHub ransomware group has published a listing on its leak site claiming responsibility for a data breach involving the Belgian organization verwarmingheyndrickx.be. This announcement, made on July 30, 2024, indicates that the threat actor group claims to have successfully compromised the organization's data and has provided various documents as evidence of the intrusion.

Ransomware groups often utilize leak sites to exert pressure on victims through a tactic known as double extortion. In this scenario, attackers not only encrypt an organization's internal systems to disrupt operations but also steal sensitive information. If the victim refuses to pay the ransom, the attackers threaten to release the stolen data publicly to cause reputational damage, legal consequences, or operational disruption for the victim and its partners.

Details of the claimed attack and leaked content

According to the claims made by the RansomHub group, the incident occurred on July 30, 2024. To support their claim of a successful compromise, the group has released several screenshots. These visual proofs contain various documents that appear to be related to the company's business operations and commercial activities.

The content identified in the leaked screenshots includes several types of sensitive business information. The specific data types mentioned in the claim include:

• Commercial invoices
• Order information
• Contact information of business partners

The exposure of such documents suggests that the attackers gained access to internal administrative and operational files. The presence of invoices and order details indicates that the breach may involve the financial and transactional history of the company's interactions with its clients and suppliers.

About Verwarming Heyndrickx

Verwarming Heyndrickx is a professional services provider based in Belgium. The company specializes in the heating, ventilation, and plumbing sectors. Their service portfolio includes providing installation, maintenance, and repair solutions designed for both residential and commercial buildings.

Potential impact and security implications

The leak of this information carries significant risks for the organization and its stakeholders. Because Verwarming Heyndrickx is based in Belgium, the exposure of sensitive commercial data could lead to potential data privacy violations and administrative sanctions under the General Data Protection Regulation (GDPR). The release of partner contact information and order details creates secondary risks for the company's supply chain partners, as these individuals or entities may become targets for follow-on attacks.

Specifically, the leaked data could facilitate targeted phishing attacks. When attackers possess details regarding business correspondence, project specifics, and invoice information, they can craft highly convincing fraudulent communications. This type of social engineering is often used to commit identity theft or engage in corporate fraud. Even though it has been reported that RansomHub's operations ceased in early 2025, the impact of data published during their active period can persist for a long time, as stolen information remains available on the dark web.

For organizations operating in the professional services and technical installation sectors, maintaining robust cybersecurity defenses is critical. Common defensive measures include implementing multi-factor authentication (MFA) across all remote access points, maintaining regular offline backups of critical data, and conducting regular security awareness training to help employees recognize phishing attempts. Furthermore, organizations should monitor their supply chain for signs of compromise, as a breach in one partner can serve as a gateway to others through the sharing of legitimate-looking but malicious business correspondence.