DisclosureLens
GLOBALMalwareEducationEducationRansomwareInterlockRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

Southeastern Oklahoma State University

bd_b8f5c2dd2e3385fe · schema v1 · pii pii-v2

Severity

High

Discovered

—

Filed

Aug 19, 2026

To disclose

—

Affected

Not disclosed

Confidence

50%
Full breach record for Southeastern Oklahoma State University →

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Interlock on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.

Group activity: EducationDiscovered: 2026-08-19

Source: Ransomware.live

Post text · scraped from the leak site

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.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Aug 19, 2026

Claim posted

—

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Claim → filing

—

Compliance clock

Not assessable

Tracked as a single-filing incident — the only disclosure on record for this event so far.Unverified claimView incident

Evidence ladder

Leak-site claimThis record

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.

Source ceiling

  • actor name
  • victim claim
  • ransom/leak status
  • discovery date
  • materiality
  • notification
  • affected count
  • confirmed data types
  • compliance clock

The ✕ fields stay blank until a regulatory filing or victim disclosure lands.

About this groupFirst seen 2023-12-01

interlock

According to ransomware.live, Interlock is a ransomware group first observed in September 2024 that targets critical infrastructure sectors including healthcare, government, education, and technology across North America and Europe using double-extortion, with 57+ claimed victims including a major US dialysis provider exposing over two million patient records.

141 tracked hereFull profile →