Disclosure context

About Hiveleak

Hiveleak is a financially-motivated ransomware group that emerged in August 2021, conducting targeted attacks primarily against organizations in the United States, United Kingdom, Netherlands, Spain, and Germany with a focus on manufacturing, business services, information technology, healthcare, and education sectors. Limited public documentation exists regarding this group's specific country of origin or affiliations with other ransomware operations, though their targeting patterns and operational timeline suggest they operate as part of the broader ransomware ecosystem that proliferated during the 2021-2022 period. The group's attack methodology and technical capabilities remain largely undocumented in major threat intelligence reports from CISA, FBI, or leading security research firms, though their victim count of 208 organizations indicates sustained operational capability over their known active period. Notable campaigns and high-profile victims have not been extensively documented in public threat intelligence reporting, suggesting the group may have maintained a lower profile compared to major ransomware operations like Conti or LockBit during the same timeframe. The current operational status of Hiveleak remains unclear based on available public intelligence reporting. The group has been linked to 208 public disclosures across our corpus. First observed on a leak site on August 14, 2021; most recent post January 16, 2023. The operation is currently inactive.

Timeline of this disclosure

December 22, 2022MHMR Authority Of Brazos Valley listed by Hiveleakon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, MHMR Authority Of Brazos Valley 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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MHMR Authority Of Brazos Valley

Claimed by Hiveleak · listed 3 years ago

41m

Age

since listed · data leaked

Status timeline

Listed
Dec 22, 2022
Data leaked

At a glance

Group: Hiveleak
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Dec 22, 2022

About the victim

AI dossier — public-source company profile

MHMR Authority of Brazos Valley is a public non-profit 501(c)(3) community behavioral health center based in Bryan, Texas, serving a seven-county area. Each year it provides mental health and intellectual & developmental disability (IDD) services to over 7,200 children and adults. It is a Certified Community Behavioral Health Clinic (CCBHC) operating under funding from the Texas Department of State Health Services and Texas Department of Health and Human Services.

Industry: Community Mental Health & Intellectual Disability Services
Address: P.O. Box 4588, Bryan, TX 77805; Crisis Triage & Diversion Center: 1906 South College Avenue, Bryan, Texas 77801

Attack summary

Severity: critical — The victim is a healthcare provider holding regulated sensitive data (HIPAA-covered mental health and IDD records) for over 7,200 vulnerable individuals including children; data has been published by the threat actor, confirming exfiltration of PII and protected health information at scale.

The Hiveleak ransomware group claims to have attacked MHMR Authority of Brazos Valley and has published data (disclosed status: data_published), indicating exfiltration of sensitive records from a healthcare provider serving vulnerable mental health and IDD populations.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient mental health records
Intellectual & developmental disability client records
Personally identifiable information (PII) of patients
Children and adult service records
Organizational/administrative data

What the group claims

The MHMR Authority of Brazos Valley is a public non-profit community MHMR center. Through the Texas Department of State Health Services and Texas Department of

Sources

Victim sitemhmrabv.org

Source

Indexed 3 years 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.