Disclosure context

About cephalus

Based on available public information, Cephalus is a recently emerged ransomware group first observed in August 2025, operating with apparent financial motivations targeting organizations primarily across the United States, United Kingdom, Netherlands, and Ireland. The group has claimed 19 victims since emergence, with no publicly documented country of origin or confirmed affiliations to established ransomware families or RaaS operations by major security researchers or government agencies. Their attack methodology and specific technical capabilities remain largely undocumented in public threat intelligence reporting, though their targeting pattern shows focus on healthcare, business services, financial services, and manufacturing sectors alongside organizations of undetermined industry classification. No major high-profile campaigns, record ransom demands, or law enforcement disruption actions have been publicly reported by CISA, FBI, or established security research firms at this time. The group appears to remain active as of current reporting, though the limited public documentation suggests either highly targeted operations or insufficient analysis coverage by major threat intelligence organizations. The group has been linked to 19 public disclosures across our corpus. First observed on a leak site on August 26, 2025; most recent post August 29, 2025. The operation is currently inactive.

Timeline of this disclosure

August 26, 2025BAR Architects & Interiors listed by cephaluson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 415 disclosures indexed across all operators we track. Geographically, BAR Architects & Interiors is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

← All victims

BAR Architects & Interiors

Claimed by cephalus · listed 9 months ago

Age

since listed · data leaked

Status timeline

Listed
Aug 26, 2025
Data leaked

At a glance

Group: cephalus
Status: Data leaked
Country: United States
Sector: Construction
Listed on leak site: Aug 26, 2025

About the victim

AI dossier — public-source company profile

BAR Architects & Interiors is a United States-based architecture and interior design firm operating under the domain bararch.com. The firm provides architectural and interior design services, though specific details on scale, headquarters, and employee count are not available from the provided sources.

Industry: Architecture & Interior Design

Attack summary

Severity: high — The group claims exfiltration and publication of over 1.5 TB of data from an architecture and interiors firm, which likely includes proprietary project files, client records, and potentially sensitive business communications. The 'data_published' status confirms actual disclosure rather than a mere listing.

The group 'cephalus' claims to have exfiltrated data from BAR Architects & Interiors, advertising a leak of over 1.5 terabytes of data. The post is marked as data_published, indicating the stolen data has been released or is being offered publicly.

high

Data the group says was taken

AI dossier — extracted from the leak post

Architectural project files
Interior design documents
Business records

What the group claims

BAR Architects & Interiors DATA LEAK | 1.5T+

Sources

Victim sitebararch.com
Leak posthttps://darkforums.st/Thread-Document-BAR-Architects-Interiors-DATA-LEAK-1-5T--18961

Source

Indexed 9 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.