Disclosure context

About BrainCipher

Braincipher is a recently emerged ransomware group that was first observed in July 2024, operating with apparent financial motivations and targeting organizations primarily across North America and Europe. The group's origin and potential affiliations remain largely undocumented by major threat intelligence organizations, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing, likely operating as an independent entity rather than through established ransomware-as-a-service infrastructure. Their attack methodology and specific technical capabilities have not been extensively documented by CISA, FBI, or major security research firms, though their victim distribution across 44 confirmed targets spanning business services, manufacturing, technology, and healthcare sectors indicates a generalist approach to target selection rather than sector-specific expertise. No major high-profile campaigns or significant law enforcement actions have been publicly documented against this group by reputable sources, suggesting either a relatively low-impact operational scale or insufficient intelligence collection on their activities. As of current reporting, the group's operational status remains unclear due to limited public documentation from established threat intelligence sources. The group has been linked to 56 public disclosures across our corpus. First observed on a leak site on July 1, 2024; most recent post May 13, 2026. The operation is currently active.

Also tracked as: brain cipher.

Timeline of this disclosure

May 1, 2026endeavourautomotive.co.uk listed by BrainCipheron the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Transportation/Logistics sector, which has 847 disclosures indexed across all operators we track. Geographically, endeavourautomotive.co.uk is reported in GB, a country with 309 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

endeavourautomotive.co.uk

Claimed by BrainCipher · listed 20 days ago

19d

Age

since listed · data leaked

Status timeline

Listed
May 1, 2026
Data leaked

At a glance

Group: BrainCipher
Status: Data leaked
Country: GB
Sector: Transportation/Logistics
Listed on leak site: May 1, 2026

About the victim

AI dossier — public-source company profile

Endeavour Automotive (endeavourautomotive.co.uk) is a UK-based automotive group operating car dealerships and related automotive retail or servicing operations. Based on the domain and sector classification, the company operates within the UK automotive retail market. No further detail was available from the public site at the time of analysis.

Industry: Automotive Retail & Services

Attack summary

Severity: high — Data has been confirmed as published (disclosed status: data_published) with over 1 TB exfiltrated and made available across 10 Tor download links, indicating significant confirmed exfiltration of business data. The exact nature of the data is unspecified, but the volume and publication status warrant a high severity rating; if PII or financial records are included at scale it could escalate to critical.

BrainCipher claims to have exfiltrated more than 1 TB of data from Endeavour Automotive, with the stolen data published and available for download via multiple Tor (.onion) links. No ransom amount was stated and no specific data categories were described in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Exfiltrated corporate data (>1 TB)
Files published via Tor download links

The group's post references roughly 10 proof files.

Original description

AI-summarised, not from the leak post

Endeavour Automotive is a UK-based car dealership group operating across England. The company sells new and used vehicles from multiple mainstream and premium brands, including Ford, Nissan, and others. It also provides vehicle servicing, parts, and aftersales support. Operating within the automotive retail industry, Endeavour Automotive runs several dealership locations primarily in the south and east of England.

The leak post

captured from the group's site

We have more 1TB of data. If you think you are here by mistake, please contact us at [email protected] 
⏳ 12d 8h 29m 41s remaining 
Download: 3fg2gfwrdks46drwvejpgpak5klrflclsjjo35dxtqfk3poeez6oezad.onion If you think you are here by mistake, please contact us at [email protected] 
Download: emdnfl2fv32jhssxcbxlo6dzg2at4d7qbw2md6inz63qzdfgyln5cwyd.onion If you think you are here by mistake, please contact us at [email protected] 
Download: a4vbe7yp4kluped6khuhpr5nmzshiimx2jt5j22ozriiq6ngsm3fcpyd.onion If you think you are here by mistake, please contact us at [email protected] 
Download: x3nb7qcygpem2j5xzstyzdtgzofzkwkx4eko3ug4r73i6uhcgvyffjyd.onion If you think you are here by mistake, please contact us at [email protected] 
Download: 3frnhzcnlkjnw5q3tm6elzizinm2k3bmrtf2xwqjzpcxzeqwn2tv6wyd.onion If you think you are here by mistake, please contact us at [email protected] 
Download: 6ft2dfh26wm3w44orpjcgviutvfp25ez2iyh5ego5egvfmifrws7vvqd.onion If you think you are here by mistake, please contact us at [email protected] 
Download: zijgmuqjzb6dc7pofxhtaiz36qqyg35lhutybmzaz6whzgei2casjgid.onion If you think…

Sources

Victim siteendeavourautomotive.co.uk
Leak posthttp://vkvsgl7lhipjirmz6j5ubp3w3bwvxgcdbpi3fsbqngfynetqtw4w5hyd.onion/n/endeavourautomotive

Source

Indexed 20 days 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.