Air Design Systems Listed by sinobi Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On November 17, 2025, the sinobi ransomware group listed Air Design Systems on its leak site, claiming to have exfiltrated internal files during a ransomware attack. The number of individuals whose information may be involved is not known, and the company has not issued a public statement confirming or detailing the incident. For people connected to the firm through employment, contracts, or project work, the listing raises the possibility that records held by a ventilation-systems provider have left its control.

Breaking down the breach

The only confirmed public detail is the November 17 listing itself. No figure for the volume of data, the date of the intrusion, or the method of access has been released. The entry describes the taking of internal files but supplies no further technical description. At present, independent verification of the claim or of any subsequent actions by the company is unavailable.

The group behind it: sinobi

Sinobi is a ransomware operator that has appeared on leak sites over the past several years. Like other groups in this category, it typically gains access through remote services, deploys encryption on target systems, and then posts samples or directories of stolen material to pressure victims. The listing of Air Design Systems follows the pattern the group has used with other organizations; the post constitutes the group’s assertion that material was obtained, rather than an independently confirmed event.

Who is Air Design Systems?

Air Design Systems, Inc. is a woman-owned company based in the Chicago area that has provided ventilation solutions since 1977. Its work includes Building Information Modeling, fabrication, and design assistance for healthcare, education, and commercial construction projects. The firm has received recognition for safety performance and maintains capabilities in 3D coordination and advanced technology integration. Organizations of this type routinely store project specifications, subcontractor records, equipment data, and internal operational documents.

What data was at risk

The listing refers only to “internal files exfiltrated in ransomware attack.” No inventory of file types or categories has been published. Companies in the building-services sector commonly retain employee records, client and vendor contact information, project drawings, financial documents, and safety or compliance files. Whether any of these categories were among the material referenced in the listing remains unconfirmed.

What's at stake

Exposure of internal files can create downstream effects for individuals whose details appear in project or personnel records. These effects may include attempts at targeted phishing or misuse of contact information. For the organization, the incident adds the tasks of assessing the scope of any access, notifying affected parties where required, and reviewing security controls. Construction and engineering firms often hold data that intersects with regulatory or safety requirements, so any confirmed exposure would require careful handling of those obligations as well.

Were you affected?

Individuals who have worked with Air Design Systems or supplied information to the company can begin by monitoring accounts associated with that relationship and enabling multi-factor authentication where available. Checking for unusual login attempts or unexpected correspondence is a standard first step. Readers may also run a free exposure scan of their email address against known breach data sets to determine whether their information has appeared in previously published listings.

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