Ransomware Intelligence

DHC Corporation Ransomware Attack

dhc.co.jp

thegentlemenGroup

JapanCountry

Jul 1, 2026Discovered

Overview

View group profile

Domain

dhc.co.jp

Industry

Healthcare

Country

Japan

Discovered

19 days ago

Attack date

Jun 30, 2026

Confidence

100%

Severity

Medium

Status

Unknown

Threat group

Total victims

577

First seen

Jul 2025

Last seen

Jul 2026

Group status

active

Sophistication

0

Impact score

89

Threat level

4.2/10

Aggressiveness10/10

Lethality0.1/10

Criticality2.4/10

Status breakdown

Data Leaked0.7%4

Negotiating0.5%3

Claimed60.3%348

Targeted sectors

Education Energy & Utilities Financial Services Government & Defense Healthcare Hospitality Manufacturing Other Professional Services Retail & E-Commerce Technology Transportation

Victim's position within group

Industry

Healthcare

Known target sector

Country

Japan

Frequently targeted country

Other victims

Same group · thegentlemen

Group activity

Monthly attacks · thegentlemen

577

total · avg 44.4/mo