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H+ Yangji Hospital (에이치플러스 양지병원)

listed as www.newyjh.com · Claimed by ULose · listed 5 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedSep 30, 2026
  2. Data leakeddate unknown

At a glance

Group
ULose
Status
Data leaked
Country
South Korea
Listed on leak site
Sep 30, 2026

About the victim

AI dossier — public-source company profile

H+ Yangji Hospital is a major private hospital in Seoul, South Korea, operating multiple specialized centers including digestive medicine, spine and joint care, neurosurgery, cardiac care, robotic surgery, and emergency medicine. The hospital serves domestic and international patients with multilingual support.

Industry
Healthcare & Hospital Services
Address
Seoul, South Korea, 08779, Gwanak-gu, Nambu Sunhwan-ro 1636

Attack summary

Severity: high — Healthcare institution with confirmed data publication by ransomware operator; medical records and patient data are regulated sensitive information in South Korea, meeting critical infrastructure and PII criteria.

The ULose group claims to have compromised H+ Yangji Hospital and published data. The leak post provides minimal detail; the specific data exfiltrated and operational impact are not detailed in the available disclosure.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Hospital patient records
  • Medical data
  • Administrative records

What the group claims

Country: Korea | Status: Sale

Sources

Source

Indexed 5 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About ULose

ULose is a ransomware group first observed in June 2026 with an assessed primary motivation of financial gain, operating against a limited but targeted victim set of five known organizations. Based on available data, the group has concentrated its operations against South Korea, with targeting patterns spanning the Financial Services, Manufacturing, and Healthcare sectors, suggesting a deliberate focus on high-value industries where operational disruption and data sensitivity may increase victim willingness to pay. Due to the group's recent emergence and limited victim count, no comprehensive public reporting from CISA, FBI, Mandiant, or equivalent threat intelligence authorities has been documented at this time, and attribution regarding country of origin, RaaS affiliation, specific tooling, or initial access vectors cannot be responsibly stated beyond what the available telemetry reflects. No notable high-profile campaigns, record ransom demands, or law enforcement actions against ULose have been publicly recorded, which is consistent with a nascent or low-volume threat actor that may be in early operational stages, deliberately maintaining a low profile, or operating beneath the threshold that typically triggers formal advisories. The group's current status remains active as of its first observed date, though its trajectory, longevity, and potential rebranding activity should be monitored given the sensitive nature of its targeted sectors. The group has been linked to 6 public disclosures across our corpus. First observed on a leak site on June 9, 2026; most recent post September 30, 2026. The operation is currently active.

Timeline of this disclosure

  • September 30, 2026www.newyjh.com listed by ULose on the group's public leak site

Other recent disclosures by ULose

ULose has been linked to 6 public victims on Darkfield. A sample of the most recent:

See the full ULose dossier →

Sector and geography

Geographically, www.newyjh.com is reported in South Korea, a country with 20 ransomware disclosures in our corpus.

If your organisation is affected

A listing by ULose means www.newyjh.com appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, KrCERT/CC (South Korea), as required for your jurisdiction.
  • Monitor for the data appearing on ULose's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.