Cyber Threat Intelligence
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Ransomware Victim Other

REXT Holdings Co., Ltd.

Ransomware attack by Ransomhouse · Disclosed September 1, 2026 · 🇯🇵 Japan

www.rext.jp

Date Disclosed
Sep 1, 2026
2026
Threat Group
Ransomhouse
147 total victims
Country
🇯🇵 Japan
Industry
Other

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.

Ransomhouse listed REXT Holdings Co., Ltd. on its dark web leak site on 1 September 2026; the Japanese company is based in Japan.

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 205 victims since June 2021.

Incident Analysis

REXT Holdings Co., Ltd. was targeted by Ransomhouse ransomware, one of the most active ransomware groups in our database with 147 confirmed victims globally. The attack was disclosed on September 1, 2026, when REXT Holdings Co., Ltd. appeared on the group's dark web leak site.

REXT Holdings Co., Ltd. is based in Japan , operating in the Other sector. Japan ranks #11 globally for ransomware attacks, with 266 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 7, 2026 02:00 UTC.

Frequently Asked Questions

Was REXT Holdings Co., Ltd. attacked by ransomware?

Yes. REXT Holdings Co., Ltd. was listed as a victim of the Ransomhouse ransomware group on September 1, 2026. The organisation is based in Japan and operates in the Other sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked REXT Holdings Co., Ltd.?

REXT Holdings Co., Ltd. was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 147 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the REXT Holdings Co., Ltd. ransomware attack occur?

The ransomware attack on REXT Holdings Co., Ltd. was disclosed on September 1, 2026. 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 REXT Holdings Co., Ltd. ransomware attack?

The specific data stolen from REXT Holdings Co., Ltd. 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 Other organisation, REXT Holdings Co., Ltd. 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.