Ransomware Group: INTERLOCK

VICTIM NAME: Semple, Marchal & Cooper, LLP

NOTE: No files or stolen information are [exfiltrated/downloaded/taken/hosted/seen/reposted/disclosed] by RedPacket Security. Any legal issues relating to the content of the files should be directed at the attackers directly, not RedPacket Security. This blog is simply posting an editorial news post informing that a company has fallen victim to a ransomware attack. RedPacket Security is in no way affiliated or aligned with any ransomware threat actors or groups and will not host infringing content. The information on this page is fully automated and redacted whilst being scraped directly from the INTERLOCK Onion Dark Web Tor Blog page.

AI Generated Summary of the Ransomware Leak Page

The ransomware leak pertains to Semple, Marchal & Cooper, LLP, a prominent regional Certified Public Accounting firm located in the southwestern United States. The breach was discovered shortly after the attack date, which occurred on June 3, 2025. The leak page reveals that sensitive company information has been compromised, although specific details are not publicly disclosed to protect privacy and prevent the dissemination of PII. The incident involves a data breach resulting in potential exposure of internal documents related to the firm’s professional services in accounting, auditing, tax planning, and consulting for various sectors including technology, healthcare, and retail. Visual evidence on the page includes a screenshot of internal documents, illustrating the extent of the data accessed during the attack.

The leak page includes links purportedly to the compromised data, indicating that the attackers may provide further access or downloads of the leaked information. The incident is associated with the ‘interlock’ threat group, known for targeting organizations in the financial and professional services sectors. Additional information suggests that the threat actors aim to pressure the victim into complying with ransom demands, potentially exposing more internal corporate details. Due to the nature of the breach, it is crucial for the affected organization to conduct a comprehensive security review and notify relevant stakeholders while maintaining confidentiality. The leak illustrates the ongoing risks faced by financial service firms in the digital age and underscores the importance of robust cybersecurity measures.