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

October 20, 2025oxfordcounty.ca listed by Braincipheron the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Public Sector sector, which has 259 disclosures indexed across all operators we track. Geographically, oxfordcounty.ca is reported in Canada, a country with 810 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

Oxford County

listed as oxfordcounty.ca · Claimed by Braincipher · listed 7 months ago

Age

since listed · data leaked

Status timeline

Listed
Oct 20, 2025
Data leaked

At a glance

Group: Braincipher
Status: Data leaked
Country: Canada
Sector: Public Sector
Listed on leak site: Oct 20, 2025

About the victim

AI dossier — public-source company profile

Oxford County is a two-tier regional municipal government in Ontario, Canada, comprising eight area municipalities. It delivers a broad range of public services including paramedic services, waste management, human services, water and wastewater, planning and development, roads, and library services. It also operates Woodingford Lodge, a long-term care facility.

Industry: Municipal / Regional Government
Address: Oxford County, Ontario, Canada

Attack summary

Severity: critical — Over 1 TB of data has been confirmed exfiltrated and publicly published via multiple download mirrors. As a regional government providing human services, children's services, paramedic services, and housing assistance, the dataset almost certainly contains large volumes of regulated PII and sensitive personal data belonging to vulnerable residents, meeting the critical threshold.

Braincipher claims to have exfiltrated more than 1 TB of data from Oxford County and has published multiple onion-hosted download links indicating the data has been fully released to the public.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Government administrative records
Resident personal information (PII)
Human services / social assistance records
Children's services records
Financial and budgetary documents
Planning and development files
Paramedic services data
Housing and shelter records
Geographic Information System (GIS) data
IT system data

The group's post references roughly 10 proof files.

Original description

AI-summarised, not from the leak post

Oxford County represents the best of both worlds: urban communities full of life, entertainment, and commerce; and rural areas that are rich in natural resources, history, and farming communities. Located in the heart of Southwestern Ontario, it is home to several thriving communities. As a municipality, its mission is to provide public services that enhance the quality of life for its citizens.

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] 
⏳ 11d 22h 39m 6s 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

Source

Indexed 7 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.