Grandes Vinos listed on Qilin ransomware leak site

• Ransomware group: Qilin
• Country: Spain
• Sector: Agriculture and Food Production
• Announcement date: December 18, 2025

The Qilin ransomware group has published a listing on its dedicated leak site claiming that the Spanish winery cooperative Grandes Vinos has been targeted in a cyberattack. This announcement, made on December 18, 2025, serves as a public claim by the threat actor that they have successfully gained access to the organization's internal networks.

The details of the claim

According to the announcement posted by the threat actor, the attack was identified on the same day the listing was published, December 18, 2025. The Qilin group has released various documents that they allege belong to Grandes Vinos. By publishing these files, the group appears to be employing double extortion tactics. In such scenarios, attackers do not merely encrypt an organization's data to disrupt operations; they also steal sensitive information to use as leverage, threatening to leak it publicly unless a ransom is paid.

The group's decision to post these files on a leak site is a common method used by ransomware operations to increase pressure on the victim. This tactic aims to damage the reputation of the target and force compliance through the threat of public exposure of sensitive corporate or personal information.

Data involved in the leak

While the group has provided evidence of the breach, the full scope and volume of the stolen data remain unspecified. The group has not provided information regarding the total size of the data or the specific number of files compromised. However, the group has shared screenshots that appear to contain various types of sensitive information. These visual examples include:

• Identity information
• Official documents

The presence of these documents, which resemble corporate records, identity cards, and other official paperwork, supports the group's claim of having accessed the organization's internal environment. The exact nature and quantity of the data remain unknown at this time.

About Grandes Vinos

Grandes Vinos is a winery cooperative located in the Cariñena region of Spain. The organization specializes in the production and distribution of wine, maintaining a wide portfolio of wines. Their products are crafted from grapes sourced from various different vineyards throughout the Cariñena region.

Impact and risk assessment

The claim made by the Qilin group poses significant risks to the organization. The potential exposure of identity information and official documents creates a risk for the personal data of employees and customers. For an organization operating within Spain, such a breach may lead to legal sanctions and administrative fines under the General Data Protection Regulation (GDPR).

Furthermore, the use of double extortion tactics means that the leaked data could be utilized in secondary attacks. This includes the potential for targeted phishing campaigns, where attackers use the stolen information to craft highly convincing messages to deceive individuals. The Qilin group, which has been active since 2022, is known to operate with a primary focus on achieving financial gain through these methods.

The incident could lead to negative impacts on the organization's reputation management and its ability to maintain operational continuity. In general, organizations facing such threats are encouraged to strengthen their network security, implement robust data encryption, and maintain comprehensive backup strategies to mitigate the impact of both encryption and data exfiltration.