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Unknown Law Firm

Claimed by Rhysida · listed 3 days ago

710.6 GB
Data size
338542 files; ~10000 matters; 1000+ litigation files records
3d
Age
since listed · listed for ransom

Status timeline

  1. ListedSep 10, 2026

Current state: Listed for ransom

At a glance

Group
Rhysida
Status
Listed for ransom
Country
United States
Sector
Legal
Listed on leak site
Sep 10, 2026
Data size
710.6 GB
Records
338542 files; ~10000 matters; 1000+ litigation files

About the victim

AI dossier — public-source company profile

A US-based law firm of unknown name and scale. The firm maintains client trust accounts, handles settlement matters, manages litigation files for insurance clients, and employs multiple partners and staff.

Industry
Legal Services

Attack summary

Severity: critical — Confirmed exfiltration of multiple categories of highly regulated and sensitive data: 42 CFR Part 2 protected methadone clinic records (strictest US confidentiality regime), medical records at scale with patient PII and diagnoses, background-check dossiers with SSNs, jail/law-enforcement records, extensive employee/contractor PII (SSN, driver licenses, bank details), and 1,000+ litigation files containing plaintiff/defendant PII. The firm also held sensitive third-party data (government, medical

Rhysida claims to have exfiltrated 814,500 files totaling 2.6 TB from the firm, including complete practice-management databases, client litigation files, partner communications, and financial records. The group also exfiltrated sensitive third-party data held by the firm: background-check dossiers with SSNs, medical records (including confidential methadone clinic records under 42 CFR Part 2), and government payroll/jail records.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Practice-management database backups (~10,000 matters)
  • Client trust account (IOLTA) statements
  • Corporate and client bank account details with routing/SWIFT
  • Employee personal identifiable information (SSN, home address, DOB, phone, email)
  • Partner and employee payroll data (ADP journals, direct-deposit forms)
  • 1,000+ litigation files with plaintiff/defendant PII
  • Background-check dossiers with full SSNs (721 records)
  • Medical records and faxes (2022–2026) with patient names and diagnoses
  • Methadone clinic records (42 CFR Part 2 protected)
  • Medical-assistance files with driver licenses, Green Cards, SSN cards, tax forms, bank data
  • County payroll registers and jail gang-intelligence files
  • Partner PST archives with settlement authorities and defense strategies
  • Insurance client settlement confirmations and ACH/EFT authorizations

The group's post references roughly 814,500 files advertised; multiple categories of data with specific file counts provided (e.g., ~100 HR folders, ~10,000 matters, 1,000+ litigation files, 721 background-check dossiers, tens of thousands of medical faxes, 47,602 medical-assistance files, 2,026 jail records) proof files.

What the group claims

Law firm with full corporate bank account details, client trust accounts, HR records, payroll data, litigation files, and partner PST archives.

The leak post

captured from the group's site
814,500 files, 2.6 TB721 background-check dossiers with full SSNs in filenames, including 2026 records.Tens of thousands of medical faxes, 2022 to 2026, with patient names and diagnoses.Methadone clinic records under 42 CFR Part 2, the strictest US confidentiality regime.47,602 medical-assistance files with driver licenses, Green Cards, SSN cards, tax forms and bank data.County payroll registers with all salaries, HR memos, contracts, pension and discipline databases.Jail gang-intelligence files with a gang-member master list.
With just 7 days on the clock, seize the opportunity to bid on exclusive, unique, and impressive data. Open your wallets and be ready to buy exclusive data. We sell only to one hand, no reselling, you will be the only owner!
Total files 338,542Total size 710.6 GBFull corporate bank account details (account, routing, SWIFT) in letters and hand-filled ACH/EFT forms signed by accountingCorporate EIN on a current signed W-9Client trust account (IOLTA) statements with account numbersACH/EFT authorizations from major insurance clients; settlement wire confirmations; check copiesComplete Positive Pay register � all firm payments with payees and amountsPartners' corp…

Data the group says was taken

  • bank account details
  • routing numbers
  • SWIFT codes
  • ACH/EFT forms
  • EIN
  • IOLTA statements
  • Positive Pay registers
  • credit card statements
  • SSNs
  • home addresses
  • payroll journals
  • HR folders
  • health insurance invoices
  • practice management DB backups
  • partner PST archives
  • litigation files
  • PII of plaintiffs/defendants
  • litigation-funding correspondence
  • payroll shortfall emails

Screenshot of the leak post

Leak screenshot for Unknown Law Firm

Sources

Source

Indexed 3 days 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.

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Disclosure context

About Rhysida

Rhysida is a ransomware group that emerged in June 2023, operating with primarily financial motivations through targeted attacks against critical infrastructure and public sector organizations. The group's origin and potential state affiliations remain unclear, though they operate independently rather than as a traditional Ransomware-as-a-Service model, with limited public documentation regarding connections to other cybercriminal organizations. Rhysida employs double extortion tactics, typically gaining initial access through compromised VPN credentials and exploiting vulnerable public-facing applications before deploying their ransomware payload and exfiltrating sensitive data prior to encryption. The group has demonstrated a particular focus on healthcare and educational institutions, with notable attacks documented by CISA and FBI advisories highlighting their targeting of hospitals and school districts across multiple countries, resulting in significant operational disruptions to critical services. As of late 2024, Rhysida remains an active threat with continued operations targeting organizations primarily in the United States, Canada, and other Western nations, maintaining their focus on high-value sectors where operational disruption can maximize ransom payment likelihood. The group has been linked to 324 public disclosures across our corpus. First observed on a leak site on June 5, 2023; most recent post September 13, 2026. The operation is currently active.

Timeline of this disclosure

  • September 10, 2026Unknown Law Firm listed by Rhysida on the group's public leak site
Data size
710.6 GB
Records
338542 files; ~10000 matters; 1000+ litigation files

Other recent disclosures by Rhysida

Rhysida has been linked to 324 public victims on Darkfield. A sample of the most recent:

See the full Rhysida dossier →

Sector and geography

This disclosure adds to ransomware activity in the Legal sector, which has 241 disclosures indexed across all operators we track. Geographically, Unknown Law Firm is reported in United States, a country with 3,165 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Rhysida means Unknown Law Firm appeared on a ransomware extortion site and is being pressured to pay before any publication. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on Rhysida's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.