CONFIRMED RANSOMWARE ATTACKS · SECTOR
Ransomnews has confirmed 1,004 ransomware attacks on education between January 2018 and October 2026, each one verified against a public source such as a breach notification, regulatory filing, court record or press report. That is 10.3% of the 9,715 confirmed incidents in the dataset. So far in 2026, 61 have been confirmed, against 113 in 2025 and 146 in 2024. The United States accounts for 650 of them (65%), with victims recorded in 54 countries in total. Where the operator is attributed, Lockbit leads with 57 confirmed victims. A ransom payment is on the public record in 33 cases and a refusal in 176; the outcome is unrecorded in the remaining 795.
Confirmed ransomware attacks on education by year
The current year is a partial count. Confirmation lags the attack itself, so recent months keep filling in after the fact; read a low figure for the latest year as incomplete rather than as a decline.
| Year | Confirmed attacks | Ransom paid (public) | Ransom refused (public) |
|---|---|---|---|
| 2018 | 18 | 3 | 4 |
| 2019 | 106 | 9 | 25 |
| 2020 | 120 | 5 | 25 |
| 2021 | 118 | 5 | 31 |
| 2022 | 125 | 5 | 22 |
| 2023 | 197 | 5 | 32 |
| 2024 | 146 | 1 | 13 |
| 2025 | 113 | 0 | 13 |
| 2026 (year to date) | 61 | 0 | 11 |
Which ransomware groups attack education most
The operator is attributed in 574 of the 1,004 confirmed incidents. Counts are confirmed victims, not leak-site claims, so they run well below the totals the groups publish about themselves. Group names link to the live Ransomtracker profile where one exists.
Most active groups by confirmed victims
Where the confirmed attacks on education fall
Country shares carry a reporting bias. United States breach-notification law and SEC disclosure rules push far more incidents onto the public record than most jurisdictions, which makes American attacks easier to confirm and inflates the US share of any confirmed dataset.
Most affected countries
Ransom payment outcomes for education
Among the 209 confirmed education incidents where the outcome is on the public record, 33 paid and 176 refused, a disclosed payment rate of 15.8%. The remaining 795 carry no public statement either way. Victims that pay have every incentive to stay quiet and public bodies are the most likely to announce a refusal, so treat this as the disclosed rate, not the true one. The ransomware payment rate analysis explains how the disclosed rate has moved since 2018 and how it compares with incident-response firm samples.
Largest confirmed ransomware attacks on education by records exposed
Record counts are recorded only where a named source disclosed them, which is the minority of cases, so this table ranks disclosed impact rather than true impact.
| Date | Organisation | Sector | Location | Records | Group | Ransom paid | Source |
|---|---|---|---|---|---|---|---|
| August 2025 | University of Phoenix | Education | Arizona, United States | 3,489,274 | Clop | Unknown | cyber.nj.gov |
| September 2024 | Texas Tech University Health Sciences Center (TTUHSC), University Medical Center in Lubbock | Education | Texas, United States | 1,628,892 | Interlock | Unknown | abc7amarillo.com |
| June 2023 | University of Manchester | Education | Manchester, United Kingdom | 1,100,000 | — | Unknown | bleepingcomputer.com |
| December 2024 | Chicago Public Schools | Education | Illinois, United States | 700,000 | Clop | Unknown | govtech.com |
| May 2026 | CKC Network, Inc. and Gakusan Co., Ltd. | Education | Nagoya, Japan | 664,000 | — | Unknown | ckc.co.jp |
| June 2020 | Metropolitan Community College of Kansas City | Education | Missouri, United States | 638,186 | — | Unknown | kctv5.com |
| December 2021 | Battelle for Kids | Education | Ohio, United States | 551,586 | — | Unknown | local12.com |
| September 2021 | Arnhem and Nijmegen University of Applied Sciences (HAN) | Education | Arnhem, Netherlands | 530,000 | — | No | cursor.tue.nl |
| July 2024 | Pennsylvania State Education Association | Education | Pennsylvania, United States | 517,487 | Rhysida | Unknown | maine.gov |
| June 2021 | Judson Independent School District | Education | Texas, United States | 428,761 | Pysa | Yes | tpr.org |
Most recent confirmed ransomware attacks on education
The 25 most recently confirmed of 1,004 incidents, newest first. Every row links to the public source it was verified against.
| Date | Organisation | Sector | Location | Records | Group | Ransom paid | Source |
|---|---|---|---|---|---|---|---|
| October 2026 | University of Illinois Chicago | Education | Illinois, United States | — | Booba Project | Unknown | therecord.media |
| October 2026 | Osaka Metropolitan University | Education | Osaka, Japan | — | — | Unknown | newsdig.tbs.co.jp |
| September 2026 | Slate Valley Unified School District | Education | Vermont, United States | — | Kairos | No | slatevalleyunified.org |
| September 2026 | Sutton Public Schools | Education | Massachusetts, United States | — | Global | Unknown | suttonma.gov |
| September 2026 | Saga University | Education | Saga, Japan | — | — | Unknown | saga-u.ac.jp |
| September 2026 | St James’ Anglican School | Education | Alkimos, Australia | — | ThreeAM | Unknown | stjames.wa.edu.au |
| September 2026 | North Slope Borough School District | Education | Alaska, United States | — | INC | Unknown | facebook.com |
| September 2026 | Universidad Católica de El Salvador | Education | Santa Ana, El Salvador | — | Wallstreet | Unknown | correio24horas.com.br |
| September 2026 | Springfield Public Schools | Education | Massachusetts, United States | 10,000 | Interlock | Unknown | springfieldpublicschools.com |
| September 2026 | Westfield Public School District | Education | New Jersey, United States | — | INC | Unknown | tapinto.net |
| August 2026 | Hong Kong Baptist University | Education | Kowloon, Hong Kong | — | The Gentlemen | No | hk01.com |
| August 2026 | Uşak Üniversitesi | Education | Usak, Turkey | 3,000 | Qilin | Unknown | usakhabergazetesi.com.tr |
| August 2026 | Brazosport College | Education | Texas, United States | — | Qilin | Unknown | brazosport.edu |
| July 2026 | Newton County Schools | Education | Georgia, United States | — | Qilin | Unknown | newtoncountyschools.org |
| July 2026 | Southeastern Oklahoma State University | Education | Oklahoma, United States | — | Interlock | Unknown | kxii.com |
| July 2026 | Universitatea de Vest "Vasile Goldiș” din Arad | Education | Arad, Romania | — | Qilin | Unknown | ziare.com |
| July 2026 | Townsville Christian College | Education | Vincent, Australia | — | — | No | townsvillebulletin.com.au |
| July 2026 | Loyalist College | Education | Belleville, Canada | — | INC | Unknown | loyalistcollege.com |
| July 2026 | Universidade de Aveiro | Education | Aveiro, Portugal | — | — | No | publico.pt |
| July 2026 | Cedar Crest College | Education | Pennsylvania, United States | — | NightSpire | Unknown | cedarcrest.edu |
| July 2026 | Hachioji Junior & Senior High School | Education | Tokyo, Japan | — | — | Unknown | hachioji.ed.jp |
| July 2026 | Universidad de Alicante | Education | Alicante, Spain | — | — | No | web.ua.es |
| June 2026 | Koyasan University | Education | Koya, Japan | — | — | Unknown | koyasan-u.ac.jp |
| June 2026 | Palatine Primary School | Education | Worthing, United Kingdom | — | Stormous | Unknown | palatineschool.org |
| June 2026 | Mount Royal University | Education | Calgary, Canada | — | CMD Organization | Unknown | emergency.mtroyal.ca |
Frequently asked questions
How many ransomware attacks on education have been confirmed?
Ransomnews has confirmed 1,004 ransomware attacks on education since January 2018, including 61 so far in 2026. Each one is verified against a public source such as a breach notification, regulatory filing or press report. The true total is higher, because many victims never disclose; confirmed counts are a floor, not a ceiling.
Which ransomware group attacks education most often?
Lockbit, with 57 confirmed victims, followed by Vice Society (46) and Pysa (30). These are confirmed victims, not leak-site claims, counted among the 574 incidents where the operator is attributed.
Which country has the most confirmed education ransomware attacks?
The United States, with 650 of the 1,004 confirmed incidents (65%). The United Kingdom is next with 85. Part of the gap is exposure and part is reporting: US breach-notification and SEC disclosure rules put more incidents on the public record than most jurisdictions.
How often do education ransomware victims pay the ransom?
Among the 209 confirmed education incidents with a public outcome, 33 paid and 176 refused, a disclosed payment rate of 15.8%. Most victims never state whether they paid, and those who pay have the least reason to say so, so the disclosed rate understates real payment behaviour. The payment rate analysis tracks this figure since 2018.
What is the largest confirmed education ransomware attack by records exposed?
University of Phoenix (Arizona, United States, August 2025), with 3,489,274 records exposed according to cyber.nj.gov. Record counts exist only where a source disclosed them, so this ranks disclosed impact.
How to read this page. Every incident counted here was verified by Ransomnews against at least one public source. Leak-site listings alone do not qualify, because operators inflate, duplicate and occasionally fabricate claims, so these totals are a defensible floor rather than a full census. Records exposed and ransom outcomes appear only where a named source disclosed them. The page is regenerated from the live database, which refreshes weekly. Cite as: Ransomnews Confirmed Ransomware Attacks Dataset, ransomnews.com, with a link to this page. Bulk access and methodology questions: [email protected]. See also the monthly ransomware statistics and the Ransomtracker.