Mafi listed on Hunters International ransomware leak site

• Ransomware group: Hunters
• Country: Austria
• Announcement date: April 23, 2025

Hunters International claims attack on Mafi

The Austria-based entity Mafi has been listed on the leak site of the Hunters International ransomware group. According to the announcement published on the group's leak platform on April 23, 2025, the group claims that data belonging to Mafi has been exfiltrated and encrypted. The group has issued threats to publish the institution's data on their platform.

This type of announcement is a hallmark of double extortion tactics commonly employed by modern ransomware groups. In these scenarios, threat actors do not merely encrypt an organization's systems to disrupt operations; they also steal sensitive information to use as leverage. By threatening to leak the stolen data publicly, attackers aim to pressure the victim into paying a ransom to prevent the exposure of confidential information, which could lead to significant reputational and legal damage.

Details of the claimed data breach

The leak announcement provided specific metrics regarding the volume of information the group claims to have compromised. While the group has made claims regarding the scale of the breach, they have not provided specific details regarding the nature or the specific types of the data involved.

The claims made by the Hunters International group include the following:

• Total data size: 66.7 GB
• Total file count: 112,530 files

The listing names no specific data types that were compromised during the alleged incident.

Potential risks and technical implications

The claims made by the Hunters International group may pose significant risks to the operational continuity and data privacy of the institution. As an Austria-based entity, it is likely that the compromised data will be subject to GDPR regulations, potentially triggering legal consequences for the organization. The publication of such data could lead to secondary risks, including identity theft or targeted phishing attacks directed at the employees and customers of the organization.

From a technical perspective, the complexity of such attacks can be significant. It is noted that the group has historically utilized the Hive codebase, suggesting a high level of technical sophistication in their operations. This historical connection indicates that the organization may be facing a highly capable adversary.

Defensive considerations for organizations

When faced with claims of data exfiltration and encryption, organizations typically need to engage in comprehensive incident response protocols. This often involves reviewing data security protocols and assessing the integrity of the network to prevent further unauthorized access. Furthermore, notifying affected parties is a critical step in managing the fallout of a potential breach, especially when regulatory frameworks like GDPR are involved.

To mitigate the risks associated with ransomware and data leaks, organizations generally focus on several defensive pillars. These include maintaining robust, offline backups to ensure operational continuity and implementing strict access controls to limit the movement of attackers within a network. Additionally, continuous monitoring and employee training are essential to detect and prevent the initial stages of an attack, such as phishing or unauthorized credential usage.