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Cyber Threat
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Ransomware victim Business Services

SOGO Auction

Listed by Ransomexx on · organisation based in Japan

sogocorporation.com

Disclosed
Apr 17, 2026
Leak-site listing date
Threat group
Ransomexx
24 victims listed
Country
Japan
#11 most targeted
Sector
Business Services

ThreatAI analysis

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

About the Ransomexx group

RansomExx is a ransomware family that targeted multiple companies starting in mid-2020. It shares commonalities with Defray777. Ransomexx has listed 86 victims since May 2020.

Incident analysis

SOGO Auction was listed by Ransomexx ransomware, a group with 24 victims recorded in this database. The listing appeared on the group's leak site on April 17, 2026.

SOGO Auction is based in Japan and operates in the Business Services sector. Japan ranks #11 worldwide for ransomware disclosures, with 301 victims in this database.

Sector context. Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

Ransomexx typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was SOGO Auction attacked by ransomware?

Yes. SOGO Auction was listed as a victim of the Ransomexx ransomware group on April 17, 2026. The organisation is based in Japan and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked SOGO Auction?

SOGO Auction was attacked by Ransomexx ransomware. Ransomexx is one of the most active ransomware groups, having claimed 24 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the SOGO Auction ransomware attack occur?

The ransomware attack on SOGO Auction was disclosed on April 17, 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 SOGO Auction ransomware attack?

The specific data stolen from SOGO Auction 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 Business Services organisation, SOGO Auction likely held sensitive business data, client information, and operational records.

How can organisations protect against Ransomexx attacks?

To defend against Ransomexx 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.