Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
KC
Ransomware Victim Technology

kc.co.kr

Ransomware attack by Underground · Disclosed May 3, 2024 · 🇰🇷 South Korea

kc.co.kr

Date Disclosed
May 3, 2024
2024
Threat Group
Underground
26 total victims
Country
🇰🇷 South Korea
Industry
Technology

ThreatAI Analysis

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

About the Underground group

Underground ransomware is deployed by the Russia-based RomCom group (Storm-0978) and has victimized companies across multiple industries since July 2023 by exploiting CVE-2023-36884, encrypting files without changing extensions and deleting Volume Shadow Copies and Windows event logs in double-extortion campaigns. Underground has listed 26 victims since May 2023.

Incident Analysis

kc.co.kr was targeted by Underground ransomware, one of the most active ransomware groups in our database with 26 confirmed victims globally. The attack was disclosed on May 3, 2024, when kc.co.kr appeared on the group's dark web leak site.

kc.co.kr is based in South Korea , operating in the Technology sector. South Korea ranks #29 globally for ransomware attacks, with 114 victims in our database.

Sector context: Technology companies hold intellectual property, customer data, and source code — all highly valuable assets. A successful ransomware attack can also put downstream customers at risk through supply chain exposure.

Underground 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 16:00 UTC.

Frequently Asked Questions

Was kc.co.kr attacked by ransomware?

Yes. kc.co.kr was listed as a victim of the Underground ransomware group on May 3, 2024. The organisation is based in South Korea and operates in the Technology sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked kc.co.kr?

kc.co.kr was attacked by Underground ransomware. Underground is one of the most active ransomware groups, having claimed 26 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the kc.co.kr ransomware attack occur?

The ransomware attack on kc.co.kr was disclosed on May 3, 2024. 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 kc.co.kr ransomware attack?

The specific data stolen from kc.co.kr 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 Technology organisation, kc.co.kr likely held source code, intellectual property, and customer data.

How can organisations protect against Underground attacks?

To defend against Underground 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.