Ransomware Group: INTERLOCK

VICTIM NAME: Semple & Cooper

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 page provides information about a cybersecurity incident involving a regional accounting firm based in the United Kingdom. The attack appears to have occurred on May 21, 2025, with the breach being disclosed shortly thereafter. The firm, known for offering a variety of professional services such as accounting, auditing, tax compliance, and management consulting, serves clients across multiple sectors including healthcare, technology, and retail. The leak confirms that sensitive data may have been compromised, although specific details of the data leak are not disclosed. The page features a screenshot that depicts internal documents, highlighting the severity of the breach and potential exposure of confidential information. Although no explicit information on the type of data stolen is provided, affected clients and stakeholders are advised to remain vigilant and consider appropriate security measures. Links to further leak details are available on dark web forums, indicating ongoing access to compromised data.

The incident was identified and publicly disclosed around the same time it was discovered, reinforcing the importance of proactive cybersecurity measures. The leaked information potentially impacts various business sectors served by the firm, emphasizing the broad threat landscape faced by organizations handling sensitive financial and personal data. The presence of a malicious actor group associated with this attack underlines the growing sophistication of cybercriminal activities targeting professional service providers. The leak page’s visual documentation, including a screenshot, underscores the real-world impact and the ongoing risk of exposure of confidential client information. Stakeholders are urged to review their security protocols and consider the implications of such breaches for reputation and compliance with data protection regulations.