// CONFIRMED RANSOMWARE ATTACKS · COUNTRY
Ransomnews has confirmed 43 ransomware attacks in Sweden between August 2020 and August 2026, each one verified against a public source such as a breach notification, regulatory filing, court record or press report. That is 0.5% of the 9,520 confirmed incidents in the dataset. So far in 2026, 4 have been confirmed, against 8 in 2025 and 13 in 2024. The most affected sector is government, with 11 confirmed victims (26%). Stockholm is the city with the most confirmed victims, at 11. Where the operator is attributed, Akira leads with 7 confirmed victims. No ransom payment is on the public record; a refusal is recorded in 13 cases and the outcome is unrecorded in the remaining 30.
Confirmed ransomware attacks in Sweden 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) |
|---|---|---|---|
| 2020 | 3 | 0 | 1 |
| 2021 | 4 | 0 | 1 |
| 2022 | 1 | 0 | 1 |
| 2023 | 10 | 0 | 5 |
| 2024 | 13 | 0 | 4 |
| 2025 | 8 | 0 | 0 |
| 2026 (year to date) | 4 | 0 | 1 |
Which ransomware groups attack organisations in Sweden most
The operator is attributed in 37 of the 43 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 Sweden fall
Most affected sectors
Cities with the most confirmed victims
Ransom payment outcomes in Sweden
Among the 13 confirmed incidents in Sweden where the outcome is on the public record, 0 paid and 13 refused, a disclosed payment rate of 0%. The remaining 30 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 in Sweden 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 | Miljödata | Technology | Karlskrona, Sweden | 1,500,000 | Data Carry | Unknown | therecord.media |
| April 2021 | Elekta, Inc. | Healthcare | Stockholm, Sweden | 441,785 | — | Unknown | compliancy-group.com |
| November 2023 | Gellyberry Studios (Ethyrial: Echoes of Yore) | Technology | Vessigebro, Sweden | 17,000 | — | Unknown | bleepingcomputer.com |
| September 2023 | Göteborgsregionens kommunalförbund | Government | Gothenburg, Sweden | 5,000 | — | No | tranemo.se |
Most recent confirmed ransomware attacks in Sweden
The 25 most recently confirmed of 43 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 | Depona AB | Service | Stockholm, Sweden | — | Qilin | Unknown | techtidningen.se |
| July 2026 | Svensk Direktreklam (SDR) | Service | Uppsala, Sweden | — | Play | No | zonebourse.com |
| April 2026 | Dorotea Kommun | Government | Dorotea, Sweden | — | INC | Unknown | dorotea.se |
| March 2026 | SATS Sverige | Other | Stockholm, Sweden | — | The Gentlemen | Unknown | mynewsdesk.com |
| December 2025 | Enea AB | Technology | Stockholm, Sweden | — | INC | Unknown | marketscreener.com |
| October 2025 | Kulturrådet - Swedish Arts Council | Government | Stockholm, Sweden | — | RansomHouse | Unknown | facebook.com |
| October 2025 | Hydroscand Machine | Manufacturing | Älvsjö, Sweden | — | Akira | Unknown | hydroscand.com |
| October 2025 | Svenska kraftnät | Government | Sundbyberg, Sweden | — | Everest | Unknown | tv4.se |
| September 2025 | Ekonomipoolen i Mark AB | Finance | Stockholm, Sweden | — | Kairos | Unknown | ekonomipoolen.se |
| August 2025 | Miljödata | Technology | Karlskrona, Sweden | 1,500,000 | Data Carry | Unknown | therecord.media |
| March 2025 | Assa Abloy AB | Manufacturing | Stockholm, Sweden | — | Cactus | Unknown | marketscreener.com |
| January 2025 | SportAdmin | Technology | Malmö, Sweden | — | RansomHub | Unknown | facebook.com |
| November 2024 | Kumla kommun | Government | Kumla, Sweden | — | Hunters International | No | kumla.se |
| October 2024 | Formpipe | Technology | Stockholm, Sweden | — | INC | No | formpipe.com |
| September 2024 | Idre Fjäll | Other | Idre Fjäll, Sweden | — | Akira | Unknown | idrefjall.se |
| August 2024 | Nora Linde Frakt | Transportation | Lindesberg, Sweden | — | Sarcoma | Unknown | facebook.com |
| August 2024 | Nilörngruppen AB | Manufacturing | Boras, Sweden | — | Play | Unknown | finance.yahoo.com |
| May 2024 | Bjurholms kommun | Government | Bjurholm, Sweden | — | RansomHub | No | ground.news |
| March 2024 | Mediplast AB | Healthcare | Malmo, Sweden | — | 8Base | Unknown | svt.se |
| March 2024 | Vstblekinge Miljo AB | Utilities | Perstorpsvägen, Sweden | — | DragonForce | Unknown | svt.se |
| February 2024 | Kalmar kommun | Government | Kalmar, Sweden | — | Akira | No | computersweden.se |
| February 2024 | Sophiahemmet | Healthcare | Stolkholm, Sweden | — | Medusa | Unknown | bnnbreaking.com |
| January 2024 | Advokatfirman Glimstedt | Legal | Kalmar, Sweden | — | 8Base | Unknown | glimstedt.se |
| January 2024 | Bjuvs kommun | Government | Bjuv, Sweden | — | Akira | Unknown | tivi.fi |
| January 2024 | Tietoevry | Technology | Solna, Sweden | — | Akira | Unknown | tietoevry.com |
Frequently asked questions
How many ransomware attacks in Sweden have been confirmed?
Ransomnews has confirmed 43 ransomware attacks in Sweden since August 2020, including 4 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 Sweden?
Akira, with 7 confirmed victims, followed by INC (3) and LockBit (3). These are confirmed victims, not leak-site claims, counted among the 37 incidents where the operator is attributed.
Which sector is hit most by ransomware in Sweden?
Government, with 11 confirmed incidents (26% of the total). Technology follows with 7, then Manufacturing with 6.
Which cities in Sweden have the most confirmed ransomware attacks?
Stockholm (11), Gothenburg (2), Kalmar (2), Malmo (2), Solna (2). 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 Sweden pay the ransom?
Among the 13 confirmed incidents in Sweden with a public outcome, 0 paid and 13 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.
What is the largest confirmed Sweden ransomware attack by records exposed?
Miljödata (Karlskrona, Sweden, August 2025), with 1,500,000 records exposed according to therecord.media. 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.