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Menninger Clinic

Claimed by Blacksuit · listed 2 years ago

22m
Age
since listed · data leaked

Status timeline

  1. ListedSep 24, 2024
  2. Data leakeddate unknown

At a glance

Group
Blacksuit
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
Sep 24, 2024

About the victim

AI dossier — public-source company profile

The Menninger Clinic is a nationally ranked mental health and addiction treatment provider based in Houston, Texas. They offer inpatient and outpatient services for adults, young adults, and children & adolescents, with expertise in treating serious mental illness, addiction, trauma, and related disorders.

Industry
Mental Health & Addiction Treatment
Address
Houston, Texas, United States

Attack summary

Severity: critical — Healthcare provider with confirmed data exfiltration of unknown scope; likely includes protected health information (PHI) and employee PII. HIPAA-regulated entity. Disclosure status confirms data published.

Blacksuit claims to have exfiltrated data from Menninger Clinic after the organization failed to respond to ransom demands. The group issued a 72-hour ultimatum before beginning publication of stolen data, though the specific nature and scope of exfiltrated information is not detailed in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Employee records
  • Patient health information
  • Personal identifiable information

What the group claims

Despite repeated attempts to contact menningerclinic.org we were ignored. The negligence of the management of this organization surprised us. This leaves us with no choice but to start publishing data. Menningerclinic.org has 72 hours to contact us and resolve the situation without exposing their employees to the problems they will face.

Sources

Source

Indexed 2 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.

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Disclosure context

About Blacksuit

Blacksuit is a financially motivated ransomware group that emerged in June 2023, quickly establishing itself as a significant threat with 184 documented victims across multiple sectors. The group's origin and specific affiliations remain largely undocumented in public threat intelligence reports, though their operational patterns suggest they operate as an independent entity rather than a traditional RaaS model. Blacksuit primarily targets organizations through common initial access vectors and employs standard ransomware deployment techniques, though detailed technical analysis of their specific encryption methods and whether they consistently employ double extortion tactics has not been widely published by major security firms. The group has demonstrated a clear preference for targeting business services, healthcare, government, and manufacturing sectors, with their victims predominantly located in English-speaking countries including the United States, United Kingdom, and Canada, as well as Spain and Germany. As of current reporting, Blacksuit remains an active ransomware operation with no publicly documented law enforcement disruptions or significant rebranding efforts. The group has been linked to 184 public disclosures across our corpus. First observed on a leak site on June 12, 2023; most recent post June 2, 2025. The operation is currently inactive.

Also tracked as: black suit.

Timeline of this disclosure

  • September 24, 2024Menninger Clinic listed by Blacksuiton the group's public leak site

Other recent disclosures by Blacksuit

Blacksuit has been linked to 184 public victims on Darkfield. A sample of the most recent:

See the full Blacksuit dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,603 disclosures indexed across all operators we track. Geographically, Menninger Clinic is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blacksuit means Menninger Clinic appeared on a ransomware extortion site and data attributed to it has been published. 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 Blacksuit'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.