Ransomware Group: SINOBI

VICTIM NAME: Mediate Management

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 SINOBI Onion Dark Web Tor Blog page.

AI Generated Summary of the Ransomware Leak Page

Mediate Management, a Boston-based property management company described in the leak, is identified as the victim. The page reproduces the firm’s self-described business scope—rentals and condo management with services such as maintenance, cleaning, and project management—and highlights around-the-clock support and an emphasis on maximizing property value. The attackers’ post states that the victim’s data has been encrypted, and it includes a cryptic line that reads “Encrypted 120900000 $ 09/08/2025 85,” which appears to reference either the scope of the encryption or a ransom-related figure, though the exact meaning is not explicitly explained on the page. The post is dated August 9, [REDACTED_PHONE]:12:06.487000) and is associated with the Sinobi group. The page also notes a claim URL and contains five attached images described as general screenshots or internal documents, with no specific details provided about their content.

From a threat-intelligence perspective, the page presents a ransomware event with an encryption claim and a prominent numeric figure paired with a date, which may signal the scope of impact or a ransom demand. The presence of five image attachments suggests the attackers claim access to internal materials, though the contents of those images are not described in the excerpt. The post does not explicitly provide a verified compromise date beyond the post date, so the published timestamp (August 9, 2025) is treated as the post date. The victim is US-based, located in Boston, and the page emphasizes the attacker’s intent to pressure for payment via a dedicated “claim” link while presenting the incident to a public audience.