Lockbit5 claims data breach against grupoconstrutodo.com

• Ransomware group: Lockbit5
• Country: Mexico
• Sector: Manufacturing
• Announcement date: December 26, 2025

Lockbit5 lists grupoconstrutodo.com on leak site

The Lockbit5 ransomware group has officially listed grupoconstrutodo.com on its dedicated leak site, alleging that the organization has suffered a data breach. This announcement, posted on December 26, 2025, marks a significant escalation in the threat landscape facing the targeted entity. Ransomware groups often use these leak sites as a tool for double extortion, a tactic where attackers not only encrypt an organization's systems but also threaten to publish sensitive information online to pressure the victim into paying a ransom.

The claim suggests that the breach is not a recent occurrence but rather a result of an incident that took place earlier in the month. Such public listings are designed to maximize reputational damage and create urgency for the victim organization to comply with the attackers' demands.

Details of the alleged incident

According to the announcement published by Lockbit5, the incident involving grupoconstrutodo.com allegedly occurred on December 7, 2025. The group has issued a threat to release the company's data to the public, setting a deadline for compliance or action by January 15, 2026. This timeline creates a high-pressure environment for the organization as it faces the potential exposure of its internal information.

The announcement provided by the threat actor includes a brief description of the company's business operations, which serves to identify the target to the public and potential buyers of stolen data. However, the group has not provided specific details regarding the exact nature of the data they claim to have compromised. The listing names no specific data types or categories that have been allegedly exfiltrated.

The scope of compromised information

At this stage, there is no detailed information available regarding the specific nature of the data allegedly compromised during the incident. The following details remain unconfirmed:

• No specific file types have been identified.
• No specific volume of data has been disclosed.
• No specific categories of information have been listed.

Because the content of the data has not been clarified by the attackers, the possibility that employee or customer information has been compromised must be considered as a significant risk.

About grupoconstrutodo.com

Comercializadora Construtodo is a Mexico-based company that has been providing materials and solutions to the construction sector for over 15 years. The organization operates in the supply and sale of various building materials intended for various construction projects. Given its long-standing presence in the manufacturing and supply chain sector, the company maintains a significant operational footprint within the Mexican construction industry.

Impact and industry implications

This alleged breach may lead to operational disruptions and reputational damage for the organization. When a company in the manufacturing and supply sector is targeted, the fallout can extend beyond the immediate digital infrastructure, potentially affecting supply chain relationships and client trust. The uncertainty regarding the data content means the organization must prepare for various scenarios, including the exposure of sensitive corporate or personal information.

The Lockbit group is known as a structure that has been active since 2019 and continues its existence by updating its infrastructure. This persistent evolution suggests that the organization may be exposed to secondary attacks or targeted phishing attempts stemming from the initial breach. In such cases, attackers use stolen information to craft highly convincing social engineering campaigns against employees or business partners.

Furthermore, under Mexican data protection regulations, the organization may face legal obligations, which could trigger administrative processes. Organizations operating in this sector should consider robust defensive measures, such as implementing strict access controls, maintaining offline backups, and conducting regular security awareness training to mitigate the risks of both initial entry and subsequent phishing attempts.