mc2engineers.com Listed by lockbit5 Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
mc2engineers.com was listed by the LockBit5 ransomware group on 25 December 2025, with internal files confirmed as having been exfiltrated. Anyone associated with the organisation should check whether their data was exposed and take appropriate steps to protect their information.
Breaking down the breach
The incident was reported on December 25, 2025, when lockbit5 added mc2engineers.com to its leak-site listing. The group claims internal files were removed from the organisation during a ransomware operation. No additional details on the timing of the intrusion, the volume of data taken, or the method of initial access have been made public. The number of people affected is listed as unknown.
Who is lockbit5?
LockBit is a ransomware-as-a-service operation that has been active since at least 2019. The group supplies encryption tools to affiliate operators in exchange for a share of ransom payments and maintains a leak site where it lists victims whose data it claims to hold. Its typical pattern involves encrypting systems and threatening to publish stolen files if a ransom is not paid. The group has appeared in multiple prior public listings involving organisations across sectors; each listing represents an unverified claim by the operators until independently confirmed.
Who is mc2engineers.com?
MC Squared is a regional engineering consulting firm that provides services in geotechnical, environmental and related engineering disciplines. Firms of this type routinely handle project documentation, site assessments, client correspondence and regulatory submissions for public and private sector work. A breach at such an organisation can expose records that contain both commercial information and personal details of clients, contractors or employees.
What data was at risk
The listing refers only to internal files exfiltrated in a ransomware attack. No inventory of specific file types, databases or data categories has been released. Organisations in the engineering consulting sector commonly store client contact information, project specifications, financial records and employee data. The precise contents of the material claimed by lockbit5 remain unconfirmed.
What's at stake
Exposure of internal engineering files can create operational and reputational consequences for the firm and its clients. If personal information is present among the files, affected individuals may face risks of targeted phishing, account misuse or identity-related fraud. The absence of confirmed data categories means the scale of personal impact cannot yet be assessed from public sources.
If your data was in this claimed breach
Individuals concerned about possible exposure should monitor their financial and email accounts for unusual activity and consider placing fraud alerts with credit reporting agencies. Changing passwords for any accounts linked to the organisation and enabling multi-factor authentication where available are standard first steps. Readers can run a free exposure scan of their email address against known breach data sets to check for appearances in previously published records.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by lockbit5 — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.