Cyber Threat Intelligence
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Ransomware Victim Consumer Services

ASKUL

Ransomware attack by Ransomhouse · Disclosed October 30, 2025 · 🇯🇵 Japan

www.askul.co.jp

Date Disclosed
Oct 30, 2025
2025
Threat Group
Ransomhouse
148 total victims
Country
🇯🇵 Japan
Industry
Consumer Services

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

ASKUL 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 October 30, 2025, when ASKUL appeared on the group's dark web leak site.

ASKUL is based in Japan , operating in the Consumer Services sector. Japan ranks #11 globally for ransomware attacks, with 273 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 ASKUL attacked by ransomware?

Yes. ASKUL was listed as a victim of the Ransomhouse ransomware group on October 30, 2025. The organisation is based in Japan and operates in the Consumer Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked ASKUL?

ASKUL 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 ASKUL ransomware attack occur?

The ransomware attack on ASKUL was disclosed on October 30, 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 ASKUL ransomware attack?

The specific data stolen from ASKUL 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 Consumer Services organisation, ASKUL 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.