Cyber Threat Intelligence
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Ransomware Victim

DHC

Ransomware attack by Thegentlemen · Disclosed August 7, 2026 · 🇯🇵 Japan

dhc.co.jp

Date Disclosed
Aug 7, 2026
2026
Threat Group
Thegentlemen
728 total victims
Country
🇯🇵 Japan
Industry
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Incident Analysis

DHC was targeted by Thegentlemen ransomware, one of the most active ransomware groups in our database with 728 confirmed victims globally. The attack was disclosed on August 7, 2026, when DHC appeared on the group's dark web leak site.

DHC is based in Japan . Japan ranks #11 globally for ransomware attacks, with 255 victims in our database.

Thegentlemen 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: Aug 7, 2026 20:00 UTC.

Frequently Asked Questions

Was DHC attacked by ransomware?

Yes. DHC was listed as a victim of the Thegentlemen ransomware group on August 7, 2026. The organisation is based in Japan. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked DHC?

DHC was attacked by Thegentlemen ransomware. Thegentlemen is one of the most active ransomware groups, having claimed 728 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the DHC ransomware attack occur?

The ransomware attack on DHC was disclosed on August 7, 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 DHC ransomware attack?

The specific data stolen from DHC 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. Sensitive business data was likely targeted.

How can organisations protect against Thegentlemen attacks?

To defend against Thegentlemen 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.