Ransomware Group: CEPHALUS

VICTIM NAME: Guerrero Mears 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 CEPHALUS Onion Dark Web Tor Blog page.

AI Generated Summary of the Ransomware Leak Page

On the leak page associated with Guerrero Mears LLP, the incident is presented as a DATALEAK with the descriptor “FORGOT THE SIZE.” The post is dated August 26, 2025, and the victim is located in the United States. The industry is not specified on the page. There is no information about encryption or a ransom amount, and the “impact” field is empty. A claim URL is indicated as present, suggesting a mechanism for further action or negotiation, though no direct data samples are shown. The page includes a brief body note indicating a verification check must complete before content loads, implying a gating step rather than a published data dump. No images or downloadable content are displayed on the page (images_count: 0, downloads_present: false). Note that there is no separate compromise date available in the data; the August 26, 2025 date is the post date.

From a threat intelligence viewpoint, the listing does not provide data volume, file types, or ransom figures. The “DATALEAK” label signals data exfiltration as part of a ransomware operation, but the content of the leak – if any – is not disclosed on the page. The absence of visible attachments, screenshots, or data samples means that the page cannot confirm what information was affected. The post date remains the only confirmed timestamp for the leak; other potential compromise dates are not provided. The presence of a claim URL implies the attackers may offer a path to public release or negotiation, but no explicit content is presented on the page itself.

Defensive takeaway: While the page provides limited information, the data-leak labeling and US-based location warrant routine breach verification for Guerrero Mears LLP. Organizations should review access controls, monitor for unusual outbound traffic, ensure backups are intact, and stay alert for any subsequent leak-page updates that might reveal data categories or potential demands. Observers should corroborate this claim with additional credible sources and monitor for follow-on postings, while coordinating with the victim to confirm breach status and respond accordingly.