Disclosure context

About brotherhood

The Brotherhood ransomware group is a recently emerged financially-motivated cybercriminal organization first observed in October 2025, representing one of the newer entrants in the ransomware landscape. Given the group's recent emergence and limited public documentation from major security firms and law enforcement agencies, detailed information about their origin, country of operation, and specific affiliations remains largely unknown to open-source intelligence. Based on observed targeting patterns, the group appears to employ opportunistic attack methodologies, focusing primarily on English-speaking markets including the United States, Australia, and Canada, while also targeting victims in Germany and Switzerland, suggesting either broad-spectrum initial access capabilities or acquisition of access through underground markets. Their victim selection spans multiple sectors including business services, construction, transportation and logistics, and technology companies, indicating a non-discriminatory approach typical of many financially-motivated ransomware operations rather than targeted campaigns against specific industries. With only 18 documented victims since their October 2025 emergence, Brotherhood represents a relatively small-scale operation compared to established ransomware groups, and specific details regarding their encryption methods, data exfiltration practices, or extortion tactics have not been publicly documented by major threat intelligence providers. The group remains active as of the latest available intelligence, though their limited operational footprint and recent emergence means comprehensive analysis of their tactics, techniques, and procedures awaits further documentation by security researchers and law enforcement agencies. The group has been linked to 18 public disclosures across our corpus. First observed on a leak site on October 10, 2025; most recent post January 6, 2026. The operation is currently active.

Timeline of this disclosure

October 11, 2025Integlia listed by brotherhoodon the group's public leak site

Data size: 66 GB

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Integlia 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

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Integlia

Claimed by brotherhood · listed 7 months ago

66 GB

Data size

Age

since listed · data leaked

Status timeline

Listed
Oct 11, 2025
Data leaked

At a glance

Group: brotherhood
Status: Data leaked
Country: Canada
Sector: Not Found
Listed on leak site: Oct 11, 2025
Data size: 66 GB

About the victim

AI dossier — public-source company profile

Integlia is a Canadian financial services firm serving business owners in the Greater Montreal area for over 40 years. The firm provides assurance and accounting, tax services, bookkeeping and cloud-based accounting, and business consulting. It operates in both English and French and offers services to both businesses and individuals.

Industry: Accounting, Tax & Financial Advisory Services
Address: Greater Montreal area, Quebec, Canada

Attack summary

Severity: critical — Integlia is an accounting and tax firm holding highly sensitive financial and personal data for numerous business and individual clients; 66 GB of exfiltrated data from such a firm almost certainly contains regulated financial PII, tax records, and confidential client business information at scale.

The Brotherhood ransomware group claims to have exfiltrated 66 GB of compressed files from Integlia and has published the data. No encryption claim is explicitly stated beyond the data disclosure.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Financial records
Tax documents
Bookkeeping data
Client accounting files
Business consulting records
Potentially personally identifiable client information

What the group claims

Contains: 66 Gb compressed Files

Sources

Victim siteinteglia.ca

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.