Open University of Cyprus
bd_ab9341226ba76aef · schema v1 · pii pii-v1
Full breach record for Open University of Cyprus →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Medusa 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.
Source: Ransomware.live
Post text · scraped from the leak site
The Open University of Cyprus (OUC) was established in 2002 and, as a public university, specializes in distance education, helping to bring Cyprus closer to achieving its strategic goal: to become a regional educational and research center and a center for international scientists and students in the Eastern Mediterranean basin. At the moment , more than 4,000 students are studying at the university , and the university is also engaged in scientific research activities
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Apr 6, 2023
Claim posted
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Corroborated · see linked filings
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Ransomware claims (1)
- Leak Sitemedusabd_3f9fdbdb24ee2bde2023-04-21 · +15dVerified by operator
Regulatory filings (1) · sorted by filing gap
- EU DPAbd_0992529b1abba4162023-11-27 · +235dVerified by operator
Filing propagation · 2 filings
View merged incident ↗Pattern: first filing Apr 6, last Nov 27 — a 235-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
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.
medusa
According to ransomware.live, Medusa is a ransomware-as-a-service operation active since June 2021 that has targeted over 300 victims across critical infrastructure sectors including healthcare, education, legal, and manufacturing using double-extortion, with attacks surging 42% between 2023 and 2024 and a formal CISA advisory issued in early 2025.