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 10, 2025Coal Industry Social Welfare Organisation listed by brotherhoodon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 374 disclosures indexed across all operators we track. Geographically, Coal Industry Social Welfare Organisation is reported in United Kingdom, a country with 902 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

Coal Industry Social Welfare Organisation

Claimed by brotherhood · listed 7 months ago

Age

since listed · data leaked

Status timeline

Listed
Oct 10, 2025
Data leaked

At a glance

Group: brotherhood
Status: Data leaked
Country: United Kingdom
Sector: Energy
Listed on leak site: Oct 10, 2025

About the victim

AI dossier — public-source company profile

CISWO (The Coal Mining Charity) is a UK registered charity based in Rotherham, South Yorkshire, dedicated to reducing disadvantage among former coal miners and their families. It supports over 200 independent mining charities, provides welfare, education grants, and end-of-life support to individuals, and acts as one of the UK's largest custodians of recreational land for former mining communities. In 2024, it supported 2,122 people and distributed over £164,000 in individual grants.

Industry: Charitable Social Welfare & Community Support (Coal Mining Communities)
Address: Rectory Drive, Whiston, Rotherham, South Yorkshire, S60 4JG, United Kingdom

Attack summary

Severity: low — The leak post explicitly contains no data and no proof files. While the disclosed status is 'data_published', there is no evidence of exfiltration, encryption impact, or sensitive data exposure provided in the post itself.

The Brotherhood ransomware group has listed CISWO under a 'data_published' disclosure status; however, the leak post contains no data, no proof files, and no ransom demand, making the nature and extent of any actual compromise unverifiable from available information.

low

What the group claims

Contains: NO DATA

Sources

Victim sitewww.ciswo.org.uk
Leak posthttp://brohoodyaifh2ptccph5zfljyajjabwjjo4lg6gfp4xb6ynw5w7ml6id.onion/

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.