hbexperts-conseils.ca Listed by m3rx Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On June 11, 2026, the ransomware group m3rx listed hbexperts-conseils.ca on its leak site, claiming to have stolen internal files from the Canadian consulting firm. The listing states that 105 gigabytes across 68,000 files were taken. No confirmation of the volume or contents has been issued by the organisation, and the number of individuals affected remains unknown.

Such listings have become a standard element of ransomware operations, where groups seek leverage by threatening to publish stolen material. The incident adds to the pattern of targeted activity against professional-service firms that hold records on clients in regulated industries.

Breaking down the breach

The only confirmed public information is the June 11, 2026 listing itself. It asserts that files were exfiltrated during a ransomware attack and specifies the quantities of 105 gigabytes and 68,000 files. No further details on the date of the intrusion, the method of initial access, or whether encryption was also deployed have been disclosed. The organisation has not published a statement confirming or denying the claims.

Inside m3rx

m3rx is a ransomware operator that follows the now-common double-extortion model: data are copied before encryption, and the group uses a leak site to pressure victims by advertising stolen material. The group’s listings typically include file counts and volume metrics as evidence of access. Public reporting on the actor shows repeated targeting of mid-sized organisations in North America and Europe, with claims published when ransom negotiations stall or fail.

In this case the group claims hbexperts-conseils.ca as a victim through its standard leak-site process. No independent verification of the data or of any ransom demand has been made public.

About hbexperts-conseils.ca

hbexperts-conseils.ca, also referred to as HB Consultants, is a Quebec-based firm that has provided building-science consulting for more than 45 years. Its services focus on roof, pavement, and building-envelope assessments for clients in the construction and building-maintenance sectors. The company maintains a listed telephone contact of +1 (514) 882-6463.

Organisations of this type routinely collect project documentation, client correspondence, technical specifications, and site-assessment records. These materials can contain details about buildings, contractors, and maintenance histories that are not otherwise public.

What data was at risk

The listing refers only to “internal files.” No inventory of specific file types or data categories has been released. Organisations in building consulting typically retain client contracts, engineering reports, drawings, and correspondence; however, whether any of these categories are present in the claimed exfiltration is unconfirmed.

What's at stake

Exposure of internal project files could reveal proprietary methods, client relationships, or site-specific technical information. For individuals or companies named in those records, the primary concerns are loss of confidentiality and potential misuse of contact or operational details. For the firm itself, the incident may affect client trust and require review of existing security and notification procedures.

What to do if you're exposed

Individuals who have worked with hbexperts-conseils.ca or similar firms should monitor their email accounts and credit files for unusual activity. A practical first step is to run a free exposure scan of an email address against known breach datasets to determine whether any associated information has already appeared in public listings. Organisations should follow established incident-response steps, including consultation with legal counsel and, where required, notification to affected parties or regulators.

AICompiled with AI assistance from public sources and published under our editorial standards.