Line Up Korea Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Line Up Korea was listed by thegentlemen ransomware group on February 21, 2026, after internal files were exfiltrated in an attack whose timing has not been established. Individuals who may have shared data with the organisation are advised to review the listing and take any necessary protective steps.
What happened
The listing appeared on February 21, 2026. The group claims to have carried out a ransomware attack against lineupkorea.com and states that internal files were exfiltrated. No further information on the timing of the intrusion, the volume of data, or the attack method has been made public.
Who is thegentlemen?
Thegentlemen is a ransomware operation that targets organizations and publishes victim names on a dedicated leak site when ransom demands are not met. The group follows a pattern seen in other ransomware actors: encryption of systems combined with the removal of data for later leverage. Its listings represent claims by the group rather than independently verified incidents.
Line Up Korea and its sector
Line Up Korea Co., Ltd. is a South Korean IT consulting firm founded in 2015 and based in Goyang City, Gyeonggi Province. It employs roughly 70 people, reports annual sales near 24.7 billion KRW, and provides system engineering and infrastructure services. The company holds recognition from the Ministry of Employment and Labor and maintains a partnership with the Korea Radio Promotion Association. Organizations in this sector routinely manage client networks, hardware configurations, and operational systems, which can contain sensitive technical and business information.
The information in question
The only detail released is that internal files were allegedly exfiltrated during the ransomware attack. The exact categories of data within those files have not been disclosed. Companies of this type commonly store employee records, client project documentation, network diagrams, and vendor agreements, yet none of these specifics have been confirmed in connection with the incident.
Why it matters
Exposure of internal files can create operational risks for the company and downstream effects for clients whose projects or systems are referenced in the material. If personal details of employees or partners are present, those individuals could encounter follow-on issues such as targeted phishing or misuse of credentials. The absence of confirmed data types leaves affected parties without a clear picture of their exposure level.
If your data was in this claimed breach
Monitor accounts tied to any email addresses or identifiers associated with Line Up Korea for unusual activity. Enable multi-factor authentication on those accounts and review recent access logs where available. Organizations holding personal data are often subject to notification requirements, though no such notice has been reported here.
- Change passwords for any services linked to the organization.
- Watch for unsolicited messages referencing the company or its projects.
- Run a free exposure scan of your email address against known breach repositories.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by thegentlemen — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.