Synopsys Listed by D1R Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On July 13, 2026, the ransomware group D1R listed Synopsys on its leak site and stated that internal files had been taken during a ransomware attack. The number of individuals whose data may be involved is not known, and no further details on the scope or contents of the material have been released. This development leaves open the possibility that records held by the company could appear in public or underground channels, affecting people connected to Synopsys through employment, contracts, or business relationships.

What happened

The only confirmed public information is the July 13, 2026 listing by D1R. The group claims that internal files were exfiltrated in a ransomware attack against Synopsys. No independent confirmation of the incident, the date of the intrusion, the volume of data, or the techniques used has been reported. The number of people affected is listed as unknown.

Who is D1R?

D1R is a ransomware group that public reporting has associated with encryption of victim systems and the subsequent posting of stolen material on a dedicated leak site when payment demands are not met. The group’s listings function as claims of responsibility rather than verified statements of fact. Its activity follows patterns seen in other ransomware operations that target corporate networks and publish file samples or directory listings to pressure victims.

About Synopsys

Synopsys develops electronic design automation software and related services used by semiconductor and electronics manufacturers. Companies in this sector routinely store proprietary design data, customer project files, employee records, and vendor information. A breach at such an organization can expose both commercial intellectual property and personal details of staff or partners.

The information in question

The listing refers to “internal files exfiltrated in ransomware attack.” No specific categories of data—such as names, contact details, financial records, or source code—have been identified in public reports. The exact contents therefore remain unconfirmed. Organizations of this type commonly hold technical documents, human-resources files, and contractual material, but whether any of those categories were taken in this instance is not known.

Why it matters

Even without confirmed personal-data categories, the exfiltration of internal files can create downstream risks. Stolen documents may contain embedded contact information, project references, or authentication details that could be used in further attacks. For the organization, the incident adds to the operational costs of investigation, potential regulatory scrutiny, and loss of confidentiality around proprietary work. Individuals connected to Synopsys have no confirmed timeline for notification or remediation steps.

If your data was in this claimed breach

Begin by monitoring accounts associated with any Synopsys-related email addresses or identifiers for unusual activity. Enable multi-factor authentication on those accounts and review recent login records. Because the exact data types remain undisclosed, treat any Synopsys-linked credentials as potentially exposed. Readers can run a free exposure scan of their email address against known breach data sets to check for prior appearances of their information.

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