mc2engineers.com listed on LockBit5 leak site

• Ransomware group: LockBit5
• Country: United States
• Sector: Professional Services
• Announcement date: December 26, 2025

LockBit5 claims a data breach against mc2engineers.com

The LockBit5 ransomware group has listed the engineering consulting firm mc2engineers.com on its leak site. This announcement, which appeared on the group's leak portal in December 2025, includes a claim of a data breach against the organization. While the group has officially listed the firm, the specific details regarding the incident remain limited to the group's initial announcement.

The group's listing includes general information regarding the firm's operations, but it does not provide specific details regarding a ransom demand or the total volume of data involved in the alleged attack. The claim suggests the breach may have occurred around December 6, 2025, though the official announcement on the leak site was published later in the month.

Details of the alleged incident

The announcement made by LockBit5 focuses on the identification of the target rather than the specifics of the stolen assets. At this stage, the group has not provided information regarding the nature or the specific content of any leaked data. Furthermore, there is no information available regarding the total file count or the specific size of the data allegedly exfiltrated during the attack.

The listing names no specific data types or categories of information that have been targeted or compromised in this alleged breach.

About mc2engineers.com

MC Squared is a regional engineering consulting firm. The organization specializes in several technical fields, including geotechnical, environmental, and materials engineering. Based in the United States, the firm provides professional services within the engineering sector.

Risk assessment and industry implications

This alleged breach may pose significant risks to the institution's operational continuity and its commercial reputation. Because the organization is a US-based entity, it may face legal proceedings under state-level data protection laws and various sectoral regulations. If data is indeed exposed, the risk of secondary attacks targeting the firm's clients and specific projects could increase.

LockBit is a ransomware group that has been tracked since 2019. It is reported to have resumed operations with a new version following infrastructure disruptions that occurred in early 2024. This demonstrates the evolving nature of ransomware-as-a-service models, where groups frequently update their infrastructure to maintain operational capabilities.

In the broader context of cybersecurity, ransomware groups often employ double extortion tactics. This method involves not only encrypting an organization's data to disrupt operations but also stealing sensitive information to threaten public disclosure. Such tactics are designed to maximize pressure on the victim to meet ransom demands. Organizations in the professional services sector often face heightened risks due to the sensitive nature of their project details and client information.

To mitigate such risks, organizations typically focus on robust defensive measures. These include maintaining rigorous backup protocols, implementing multi-factor authentication across all access points, and conducting regular security audits. Furthermore, monitoring for unauthorized data exfiltration and maintaining a comprehensive incident response plan are standard industry practices to ensure resilience against evolving threats from groups like LockBit.