Cyber Threat Intelligence
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Ransomware Victim Public Sector

Swedish Arts Council

Ransomware attack by Ransomhouse · Disclosed November 24, 2025 · 🇸🇪 Sweden

www.kulturradet.se

Date Disclosed
Nov 24, 2025
2025
Threat Group
Ransomhouse
148 total victims
Country
🇸🇪 Sweden
Industry
Public Sector

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Ransomhouse. Figures and technique mappings are quoted from the source data, not inferred.

About the Ransomhouse group

RansomHouse is a double-extortion RaaS operation active since late 2021, attributed to the threat actor "Jolly Scorpius," targeting over 120 organizations across healthcare, finance, transportation, and government, recently upgrading to a multi-layered dual-key encryption architecture. Ransomhouse has listed 206 victims since June 2021.

Incident Analysis

Swedish Arts Council was targeted by Ransomhouse ransomware, one of the most active ransomware groups in our database with 148 confirmed victims globally. The attack was disclosed on November 24, 2025, when Swedish Arts Council appeared on the group's dark web leak site.

Swedish Arts Council is based in Sweden , operating in the Public Sector sector. Sweden ranks #23 globally for ransomware attacks, with 134 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Ransomhouse typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 16, 2026 10:00 UTC.

Frequently Asked Questions

Was Swedish Arts Council attacked by ransomware?

Yes. Swedish Arts Council was listed as a victim of the Ransomhouse ransomware group on November 24, 2025. The organisation is based in Sweden and operates in the Public Sector sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Swedish Arts Council?

Swedish Arts Council was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 148 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Swedish Arts Council ransomware attack occur?

The ransomware attack on Swedish Arts Council was disclosed on November 24, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Swedish Arts Council ransomware attack?

The specific data stolen from Swedish Arts Council has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Public Sector organisation, Swedish Arts Council likely held sensitive business data, client information, and operational records.

How can organisations protect against Ransomhouse attacks?

To defend against Ransomhouse and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.