CONFIRMED RANSOMWARE ATTACKS · COUNTRY
Ransomnews has confirmed 29 ransomware attacks in Czechia between April 2018 and August 2026, each one verified against a public source such as a breach notification, regulatory filing, court record or press report. That is 0.3% of the 9,715 confirmed incidents in the dataset. So far in 2026, 6 have been confirmed, against 4 in 2025 and 4 in 2024. The most affected sector is government, with 14 confirmed victims (48%). Prague is the city with the most confirmed victims, at 11. Where the operator is attributed, INC leads with 3 confirmed victims. No ransom payment is on the public record; a refusal is recorded in 11 cases and the outcome is unrecorded in the remaining 18.
Confirmed ransomware attacks in Czechia 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 | 1 | 0 | 1 |
| 2019 | 2 | 0 | 1 |
| 2020 | 4 | 0 | 1 |
| 2021 | 3 | 0 | 2 |
| 2022 | 1 | 0 | 1 |
| 2023 | 4 | 0 | 2 |
| 2024 | 4 | 0 | 1 |
| 2025 | 4 | 0 | 1 |
| 2026 (year to date) | 6 | 0 | 1 |
Which ransomware groups attack organisations in Czechia most
The operator is attributed in 19 of the 29 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 in Czechia fall
Most affected sectors
Cities with the most confirmed victims
Ransom payment outcomes in Czechia
Among the 11 confirmed incidents in Czechia where the outcome is on the public record, 0 paid and 11 refused, a disclosed payment rate of 0%. The remaining 18 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.
Most recent confirmed ransomware attacks in Czechia
The 25 most recently confirmed of 29 incidents, newest first. Every row links to the public source it was verified against.
| Date | Organisation | Sector | Location | Records | Group | Ransom paid | Source |
|---|---|---|---|---|---|---|---|
| August 2026 | Partners HoldCo, a.s. | Finance | Prague, Czechia | — | INC | Unknown | seznamzpravy.cz |
| July 2026 | Město Šumperk | Government | Sumperk, Czechia | — | SafePay | Unknown | sumpersky.denik.cz |
| May 2026 | Vysoká škola finanční a správní (University of Finance and Administration) | Education | Prague, Czechia | — | The Gentlemen | Unknown | facebook.com |
| April 2026 | Muzeum regionu Valašsko | Government | Vsetín, Czechia | — | DeadLock | Unknown | muzeumvalassko.cz |
| March 2026 | Městský úřad Jemnice | Government | Jemnici, Czechia | — | LockBit | No | trebicsky.denik.cz |
| March 2026 | Zámek Náměšť nad Oslavou | Government | Náměšť nad Oslavou, Czechia | — | The Gentlemen | Unknown | irozhlas.cz |
| May 2025 | Kosmas | Retail | Prague, Czechia | — | Lynx | No | kosmas.cz |
| May 2025 | Gymnázium a Jazyková škola Zlín | Education | Zlín, Czechia | — | SafePay | Unknown | gjszlin.cz |
| April 2025 | Městský úřad Kraslice | Government | Kraslice, Czechia | — | — | Unknown | kraslice.cz |
| April 2025 | Správa služeb hlavního města Prahy (Prague City Service Administration) | Government | Prague, Czechia | — | Cicada3301 | Unknown | prazsky.denik.cz |
| October 2024 | Pražské služby | Government | Prague, Czechia | — | Akira | Unknown | psas.cz |
| October 2024 | Borohrádek | Government | Borohradek, Czechia | — | INC | No | idnes.cz |
| October 2024 | PBS Group, a.s. | Manufacturing | Prague, Czechia | — | INC | Unknown | idnes.cz |
| September 2024 | Ostrov | Government | Ostrov, Czechia | — | — | Unknown | idnes.cz |
| September 2023 | University of Defence | Education | Brno, Czechia | — | Monti | Unknown | english.radio.cz |
| September 2023 | Univerzita Obrany | Education | Brno-střed, Czechia | — | Monti | Unknown | irozhlas.cz |
| June 2023 | Český Rozhlas (ČRo) - Czech Radio | Other | Prague, Czechia | — | — | No | lupa.cz |
| June 2023 | Omnipol | Manufacturing | Praha, Czechia | — | Play | No | securitymagazin.cz |
| May 2022 | Ředitelství silnic a dálnic (ŘSD) | Government | Prague, Czechia | — | — | No | irozhlas.cz |
| May 2021 | Národní Knihovna (National Library of Czech Republic) | Government | Prague, Czechia | — | — | Unknown | skipcr.cz |
| April 2021 | Magistrát města Olomouce | Government | Olomouc, Czechia | — | Avaddon | No | databreaches.net |
| April 2021 | Asbis CZ | Technology | Čestlice, Czechia | — | Avaddon | No | databreaches.net |
| April 2020 | Prague 3 District Town Hall (Prahy 3) | Government | Prague, Czechia | — | — | Unknown | nukib.cz |
| April 2020 | Povodí Vltavy | Government | Prague, Czechia | — | — | Unknown | nukib.cz |
| March 2020 | Psychiatrická nemocnice Kosmonosy | Healthcare | Kosmonosy, Czechia | — | — | Unknown | blog.avast.com |
Frequently asked questions
How many ransomware attacks in Czechia have been confirmed?
Ransomnews has confirmed 29 ransomware attacks in Czechia since April 2018, including 6 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 is most active in Czechia?
INC, with 3 confirmed victims, followed by Avaddon (2) and Monti (2). These are confirmed victims, not leak-site claims, counted among the 19 incidents where the operator is attributed.
Which sector is hit most by ransomware in Czechia?
Government, with 14 confirmed incidents (48% of the total). Education follows with 5, then Healthcare with 3.
Which cities in Czechia have the most confirmed ransomware attacks?
Prague (11), Brno (2), Benešov (1), Borohradek (1), Brno-střed (1). City is recorded where the victim organisation is headquartered or the incident was reported, so distributed organisations are counted once.
How often do ransomware victims in Czechia pay the ransom?
Among the 11 confirmed incidents in Czechia with a public outcome, 0 paid and 11 refused, a disclosed payment rate of 0%. 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.
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.