Maki Building Centers listed on interlock leak site

• Ransomware group: interlock
• Country: United States
• Sector: Retail & E-Commerce
• Announcement date: October 27, 2025

Maki Building Centers has been listed on a leak site by the threat actor known as interlock. The announcement, made on October 27, 2025, indicates that the organization has been targeted in a cyberattack involving the potential exposure of sensitive information.

The claims made by interlock

The interlock group claims to have successfully gained access to the internal systems of Maki Building Centers. According to the threat actor, the breach resulted in the acquisition of various corporate data sets. In their announcement, the group alleges that the security measures implemented by the organization were insufficient to prevent the intrusion.

The threat actor further stated that the relevant data has been, or is intended to be, made public on their platform. While the group has made these claims, specific details regarding the exact nature of the intrusion or the methods used to bypass security protocols have not been provided in the public announcement.

Evidence of the breach

Based on the information available from the leak site, a screenshot was provided by the threat actor. This visual evidence displays several directory folders, including 3apps, FodyR, Reports, share, and usrPro. However, no detailed information regarding the specific content or the exact nature of the files contained within these folders has been made available at this time.

Data potentially affected by the incident

The listing suggests that the breach may involve several categories of sensitive information. While the exact volume and specific contents of the files remain unconfirmed, the following data types are identified as being potentially affected:

• Corporate data
• Employee data
• Customer data

The potential exposure of such data types carries significant risks. In many ransomware scenarios, threat actors utilize a method known as double extortion, where they not only encrypt an organization's systems but also steal sensitive data to use as leverage during ransom negotiations. By threatening to release this information publicly, attackers aim to increase the pressure on the victim to meet their demands.

About Maki Building Centers

Maki Building Centers is a retail company engaged in the sale and manufacturing of building materials. The organization operates with three branches located in central Massachusetts. Beyond retail sales, the company provides essential materials and logistical support for various construction projects throughout the region.

Implications and organizational risk

This incident may bring the risk of exposure for both employee and customer data within Maki Building Centers. Because the organization is based in the United States, the breach may trigger legal processes under state-level data breach notification laws and other relevant regulatory frameworks. The potential exposure of personal and corporate information can lead to various downstream consequences.

The exposed data could potentially be used by malicious actors for identity theft or for conducting targeted phishing attacks against the organization's employees or customers. Such attacks often use stolen information to gain further access to networks or to defraud individuals.

For organizations operating in the retail and construction supply sector, this incident highlights the importance of robust cybersecurity postures. Maintaining operational continuity is a primary concern, and a breach of this nature can have negative impacts on an organization's ability to function normally. To mitigate such risks, organizations typically focus on implementing defensive measures such as multi-factor authentication, regular security audits, and comprehensive employee training to recognize social engineering attempts. As public information regarding the interlock group remains limited, the full scope of the threat they pose continues to be assessed by the security community.