Blaise C. Bender, PC listed on Interlock ransomware leak site

• Ransomware group: Interlock
• Country: United States
• Sector: Professional Services
• Announcement date: September 30, 2026

The Interlock ransomware group has announced the alleged leak of data belonging to the law firm Blaise C. Bender, PC. According to the group's announcement on their leak site, the firm has been targeted in a cyberattack that has resulted in the exposure of a significant volume of sensitive information.

The alleged data breach incident

On September 30, 2026, the Interlock group listed the law firm Blaise C. Bender, PC on their dedicated leak site. The group claims that the firm failed to adequately secure confidential client information, and as a consequence, the group has proceeded to disclose this data to the public. A screenshot provided by the group indicates a data volume of approximately 374.5 GB.

While the group has made these claims, information regarding the specific identity and operational details of the Interlock group remains limited. The group's actions appear to align with a double-extortion strategy, a common tactic in modern ransomware attacks where threat actors not only encrypt an organization's systems but also steal sensitive data to exert pressure through the threat of public disclosure.

Alleged contents of the leaked data

The data allegedly stolen by the Interlock group is highly sensitive, given the nature of the professional services provided by the victim organization. The leaked information is claimed to include a variety of critical documents and communications, such as:

• Client tax records
• Mergers and acquisitions (M&A) documents
• Estate and trust papers
• Corporate management records
• Confidential attorney-client communications

The exposure of such diverse and sensitive datasets poses significant risks to the individuals and entities represented by the firm.

About Blaise C. Bender, PC

Blaise C. Bender, PC is a law and tax consulting firm based in Texas, United States. The firm provides a wide range of professional services in specialized areas, including tax planning, mergers and acquisitions, estate and trust management, and corporate law. Due to the high-stakes nature of these services, the firm handles a vast amount of confidential and proprietary information for its clients.

Potential implications and organizational risks

Given the nature of the alleged data, clients may be exposed to secondary risks such as identity theft and fraud. The sensitive nature of tax records and legal communications makes them highly valuable on the dark web for malicious actors.

From a legal standpoint, the firm may face significant challenges. This includes potential legal penalties under Section 7216 of the Internal Revenue Code and the Texas Privacy Act. Furthermore, the firm could be subject to civil lawsuits stemming from professional negligence and breach of fiduciary duty. Beyond the legal and regulatory consequences, such an incident may cause significant reputational damage and a lasting loss of client trust.

In the professional services sector, such incidents underscore the necessity of robust cybersecurity frameworks. Organizations in this sector typically focus on implementing multi-factor authentication, rigorous encryption for data at rest and in transit, and continuous monitoring to detect unauthorized access. Defending against double-extortion requires not only strong perimeter defenses but also comprehensive data loss prevention strategies and incident response plans designed to mitigate the impact of a potential leak.