Was Southeastern Oklahoma State University hit by ransomware?

Southeastern Oklahoma State University was listed by the Interlock ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Interlock ransomware group?

Interlock is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Southeastern Oklahoma State University breach?

Interlock published data attributed to Southeastern Oklahoma State University. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Southeastern Oklahoma State University

Claimed by Interlock · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedAug 19, 2026
Data leakeddate unknown

At a glance

Group: Interlock
Status: Data leaked
Country: United States
Sector: Education
Listed on leak site: Aug 19, 2026

About the victim

AI dossier — public-source company profile

Southeastern Oklahoma State University is a public four-year university located in Durant, Oklahoma. It serves students across undergraduate and graduate programs.

Industry: Higher Education
Address: Durant, Oklahoma, US

Attack summary

Severity: critical — Confirmed exfiltration of highly sensitive regulated data at scale: PII (names, SSNs, dates of birth) for 90,000+ students; medical information protected under HIPAA; disciplinary and financial aid records protected under FERPA; employee injury and healthcare data. The breach violates multiple federal privacy regulations (FERPA, HIPAA).

The interlock group claims to have exfiltrated student and employee personal records, including names, Social Security numbers, grades, enrollment data, financial aid information, disciplinary records, and medical information. The breach affected more than 90,000 students and an unspecified number of employees.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Student names
Social Security numbers
Student identification numbers
Contact information
Grades
Enrollment data
Financial aid information
Disciplinary records
Medical information from educational records
Employee names
Employee dates of birth
Employee dates of injury
Medicare card information
Child custody/consent status
Forms 1095-C (tax forms)

What the group claims

Southeastern Oklahoma State University is a public, four-year university located in Durant, Oklahoma. A data breach exposed student educational records (including names, contact information, Social Security numbers, grades, enrollment data, financial aid information, disciplinary records, and medical information contained in educational records). This breach violates the Family Educational Rights and Privacy Act (FERPA), the HIPAA Privacy Rule, and students' common-law privacy rights. The breach affected employee personal data and injury information, including employee name, date of birth, date of injury, as well as Social Security number, Medicare card, and child custody/consent status. More than 90,000 student names, Social Security numbers, and student identification numbers, as well as Forms 1095-C and more than 490 documents.

Sources

Victim sitese.edu
Leak posthttp://mfrgymzi6w34lmxojf7hgteoskqo6j5zelunqh3dwxcmz7bbacqzwcad.onion/index.php?p=

Source

Indexed 4 hours 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 Interlock

Interlock is a recently emerged ransomware group that began operations in October 2024, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's country of origin and potential affiliations remain unclear given their recent emergence, with insufficient public documentation to determine whether they operate as an independent entity or under a Ransomware-as-a-Service model. Limited public information exists regarding their specific attack methodologies, initial access vectors, or encryption techniques, as major cybersecurity firms and law enforcement agencies have not yet published comprehensive technical analyses of their operations. Since beginning operations, Interlock has reportedly compromised approximately 100 victims, with their targeting primarily focused on organizations in English-speaking countries including the United States, Canada, United Kingdom, and Australia, as well as Italy, while demonstrating a preference for attacking education, manufacturing, healthcare, and public sector entities. The group remains active as of late 2024, though comprehensive threat intelligence profiles from established security research organizations have not yet been published due to the group's recent emergence in the threat landscape. The group has been linked to 122 public disclosures across our corpus. First observed on a leak site on October 13, 2024; most recent post August 19, 2026. The operation is currently active.

Timeline of this disclosure

August 19, 2026Southeastern Oklahoma State University listed by Interlockon the group's public leak site

Other recent disclosures by Interlock

Interlock has been linked to 122 public victims on Darkfield. A sample of the most recent:

See the full Interlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 1,087 disclosures indexed across all operators we track. Geographically, Southeastern Oklahoma State University is reported in United States, a country with 3,162 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Interlock means Southeastern Oklahoma State 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 Interlock'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.