Cyber Threat Intelligence
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Ransomware Victim Financial Services

KyungRok

Ransomware attack by Ulose · Disclosed June 9, 2026 · 🇰🇷 South Korea

kyungrok.com

Date Disclosed
Jun 9, 2026
2026
Threat Group
Ulose
5 total victims
Country
🇰🇷 South Korea
Industry
Financial Services

ThreatAI Analysis

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

About the Ulose group

Ulose has listed 5 victims since June 2026.

Incident Analysis

KyungRok was targeted by Ulose ransomware, one of the most active ransomware groups in our database with 5 confirmed victims globally. The attack was disclosed on June 9, 2026, when KyungRok appeared on the group's dark web leak site.

KyungRok is based in South Korea , operating in the Financial Services sector. South Korea ranks #29 globally for ransomware attacks, with 114 victims in our database.

Sector context: Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Ulose 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 00:00 UTC.

Frequently Asked Questions

Was KyungRok attacked by ransomware?

Yes. KyungRok was listed as a victim of the Ulose ransomware group on June 9, 2026. The organisation is based in South Korea and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked KyungRok?

KyungRok was attacked by Ulose ransomware. Ulose is one of the most active ransomware groups, having claimed 5 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the KyungRok ransomware attack occur?

The ransomware attack on KyungRok was disclosed on June 9, 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 KyungRok ransomware attack?

The specific data stolen from KyungRok 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 Financial Services organisation, KyungRok likely held financial records, client data, and transaction histories.

How can organisations protect against Ulose attacks?

To defend against Ulose 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.