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Miami University

Claimed by Nokoyawa · listed 3 years ago

38m
Age
since listed · data leaked

Status timeline

  1. ListedMay 23, 2023
  2. Data leakeddate unknown

At a glance

Group
Nokoyawa
Status
Data leaked
Country
United States
Sector
Education
Listed on leak site
May 23, 2023

About the victim

AI dossier — public-source company profile

Miami University is a public research university founded in 1809 and located in Oxford, Ohio. It is consistently ranked among the top public universities in the United States, offering undergraduate, graduate, and online programs across multiple campuses including Oxford, regional campuses, and a Luxembourg campus. It serves tens of thousands of students and is recognized for undergraduate teaching excellence and career outcomes.

Industry
Higher Education
Address
501 E High St, Oxford, Ohio 45056, United States
Employees
1001-5000
Founded
1809

Attack summary

Severity: critical — Miami University is a large public university whose systems likely contain regulated PII at scale, including student records (FERPA-protected), employee records, and potentially health and financial data for tens of thousands of individuals; data has been confirmed published by the threat actor.

The Nokoyawa ransomware group claims to have attacked Miami University and has published data, indicating exfiltration of university data; the post does not specify an encryption event or ransom demand, but the disclosed status confirms data has been released.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • University administrative records
  • Student data
  • Faculty and staff records
  • Financial records
  • Research data

What the group claims

Established in 1809, Miami University is consistently ranked among the top 50 national public universities by the U.S. News & World Report for providing students with an Ivy League-quality education at a public-school price. Located in quintessential college town Oxford, Ohio-with...

Sources

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.

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Disclosure context

About Nokoyawa

Nokoyawa is a ransomware group that emerged in December 2022, operating with primarily financial motivations and targeting organizations across multiple sectors including healthcare, non-profit, education, finance, and energy. The group has claimed at least 36 victims since its emergence, with attacks predominantly focused on the United States, Canada, United Kingdom, France, and the Philippines. While detailed technical analysis of Nokoyawa's operations remains limited in public reporting, the group appears to follow conventional ransomware tactics targeting critical infrastructure and essential services sectors. Their targeting of healthcare and educational institutions suggests they operate without the sector restrictions that some other ransomware groups have adopted. Notable campaigns include attacks across their preferred geographic regions, though specific high-profile incidents have not been extensively documented in public threat intelligence reporting from major security firms. As of current reporting, Nokoyawa appears to remain an active threat, though the group's relatively recent emergence means long-term operational patterns and potential law enforcement disruption efforts are still developing. The group has been linked to 36 public disclosures across our corpus. First observed on a leak site on December 9, 2022; most recent post August 4, 2023. The operation is currently inactive.

Timeline of this disclosure

  • May 23, 2023Miami University listed by Nokoyawaon the group's public leak site

Other recent disclosures by Nokoyawa

Nokoyawa has been linked to 36 public victims on Darkfield. A sample of the most recent:

See the full Nokoyawa dossier →

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 1,082 disclosures indexed across all operators we track. Geographically, Miami University is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Nokoyawa means Miami University 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 Nokoyawa'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.