Patriarche Office of Architecture listed on Hunters leak site

• Ransomware group: Hunters
• Country: France
• Sector: Professional Services
• Announcement date: January 11, 2025

Patriarche Office of Architecture listed on Hunters leak site

The threat actor known as Hunters has listed the French-based firm Patriarche Office of Architecture on its dedicated leak platform. According to the announcement made on January 11, 2025, the group claims to have successfully exfiltrated a massive dataset belonging to the organization. This development marks a significant incident for the professional services firm, as the threat actor has moved to publicize the breach on a leak site.

Details of the claimed exfiltration

The announcement provided by the Hunters group outlines the specifics of the alleged breach. The threat actor claims that the attack occurred on January 11, 2025, the same day the listing appeared. Notably, the group has stated that the organization's systems were not encrypted during this incident. Instead, the attackers claim they focused their efforts on the successful exfiltration of data from the organization's internal systems.

In modern cyber extortion, groups often employ a strategy known as double extortion. In this model, attackers do not merely lock a company out of its own data through encryption; they also steal sensitive information to use as leverage. By threatening to release this data publicly, the attackers aim to pressure the victim into paying a ransom to prevent the exposure of confidential information. This shift in tactics highlights a growing trend where data theft is prioritized over traditional ransomware encryption.

Data involved in the claim

While the group has provided specific metrics regarding the volume of the stolen information, they have not provided a detailed breakdown of the specific content or types of files involved. The listing names no specific data types, only the following metrics:

• Total data size: 2.3 TB
• Total file count: 401,989 files

About Patriarche Office of Architecture

Patriarche Office of Architecture is a design and architecture firm based in France. The organization specializes in a wide range of professional services, including architecture, urban planning, landscape design, and engineering. The firm is known for its focus on delivering sustainable and innovative projects within the professional services sector.

Implications and organizational risks

The potential consequences of this alleged breach are multifaceted. If the exfiltrated data contains sensitive information regarding employees or clients, the organization may face significant compliance issues under the General Data Protection Regulation (GDPR). Such regulatory scrutiny often follows the exposure of personal data, potentially leading to legal and financial repercussions.

Beyond regulatory concerns, the publication of such a large volume of data can lead to severe reputational damage. For a firm specializing in design and engineering, maintaining client trust is paramount, and a public data leak can undermine that confidence. Furthermore, the exposure of internal data can increase the risk of secondary attacks, where malicious actors use the leaked information to conduct targeted phishing campaigns or identity theft.

The Hunters group, which is considered to be derived from Hive code, has reportedly announced the cessation of its encryption activities as of 2025. This strategic shift suggests that the group may now be focusing exclusively on data exfiltration as its primary extortion strategy. For organizations in the professional services sector, this evolution in threat actor behavior necessitates a focus on robust data loss prevention (DLP) measures, enhanced monitoring of data movement, and strict access controls to mitigate the risk of unauthorized exfiltration.