Cyber Threat Intelligence
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Ransomware Victim Manufacturing

Yulkok Ltd

Ransomware attack by Beast · Disclosed February 5, 2026 · 🇰🇷 South Korea

www.yulkok.com

Date Disclosed
Feb 5, 2026
2026
Threat Group
Beast
72 total victims
Country
🇰🇷 South Korea
Industry
Manufacturing

ThreatAI Analysis

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

About the Beast group

Beast is a Ransomware-as-a-service (RaaS) product which provides functionality such as SMB scanning, file encryption, service and process starting and stopping, and geographic identification to avoid encryption in CIS countries. Beast has listed 70 victims since December 2023.

Incident Analysis

Yulkok Ltd was targeted by Beast ransomware, one of the most active ransomware groups in our database with 72 confirmed victims globally. The attack was disclosed on February 5, 2026, when Yulkok Ltd appeared on the group's dark web leak site.

Yulkok Ltd is based in South Korea , operating in the Manufacturing sector. South Korea ranks #29 globally for ransomware attacks, with 114 victims in our database.

Sector context: Manufacturing companies are frequently targeted because production downtime directly translates to financial loss. Ransomware operators exploit this time-sensitivity to demand higher ransoms and faster payment.

Beast 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 6, 2026 16:00 UTC.

Frequently Asked Questions

Was Yulkok Ltd attacked by ransomware?

Yes. Yulkok Ltd was listed as a victim of the Beast ransomware group on February 5, 2026. The organisation is based in South Korea and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Yulkok Ltd?

Yulkok Ltd was attacked by Beast ransomware. Beast is one of the most active ransomware groups, having claimed 72 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Yulkok Ltd ransomware attack occur?

The ransomware attack on Yulkok Ltd was disclosed on February 5, 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 Yulkok Ltd ransomware attack?

The specific data stolen from Yulkok Ltd 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 Manufacturing organisation, Yulkok Ltd likely held sensitive business data, client information, and operational records.

How can organisations protect against Beast attacks?

To defend against Beast 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.