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, 2025Citizens' Committee for Children of New York listed by brotherhoodon the group's public leak site

Data size: 45 GB

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, Citizens' Committee for Children of New York 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

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Citizens' Committee for Children of New York

Claimed by brotherhood · listed 7 months ago

45 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: United States
Sector: Public Sector
Listed on leak site: Oct 11, 2025
Data size: 45 GB

About the victim

AI dossier — public-source company profile

Citizens' Committee for Children of New York (CCC New York) is a nonprofit advocacy organization based in New York City that has operated for over 80 years. The organization conducts research and data analysis on child and family well-being, engages in policy advocacy at the city, state, and federal levels, and mobilizes civic engagement to address systemic inequities affecting New York City's children and families. Its work spans issues including health, housing, education, child care, and economic security.

Industry: Child & Family Advocacy / Nonprofit Policy Research
Address: New York, NY, United States
Employees: 11-50
Founded: 1944

Attack summary

Severity: high — 45 GB of data has been published from a nonprofit that handles research on vulnerable populations including children and families, likely containing PII of program participants, community members, staff, and potentially minors — a sensitive population. The 'data_published' status confirms exfiltration and public exposure of significant organizational data.

The ransomware group 'brotherhood' claims to have exfiltrated 45 GB of compressed files from Citizens' Committee for Children of New York, with the data now published as a disclosed leak. No ransom amount was stated and no additional detail about encryption or data categories was provided in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Compressed organizational files (45 GB)

What the group claims

Contains: 45 Gb compressed Files

Sources

Victim sitewww.cccnewyork.org

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.