Skip to content
Cyber Threat
CTI Academy Sponsor CTI Academy
Ransomware victim Technology

Simmtech Co., Ltd.

Listed by Underground on · organisation based in South Korea

simmtech.com

Disclosed
Dec 16, 2024
Leak-site listing date
Threat group
Underground
26 victims listed
Country
South Korea
#21 most targeted
Sector
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

Simmtech Co., Ltd. was listed by Underground ransomware, a group with 26 victims recorded in this database. The listing appeared on the group's leak site on December 16, 2024.

Simmtech Co., Ltd. is based in South Korea and operates in the Technology sector. South Korea ranks #21 worldwide for ransomware disclosures, with 149 victims in this 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 follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Simmtech Co., Ltd. attacked by ransomware?

Yes. Simmtech Co., Ltd. was listed as a victim of the Underground ransomware group on December 16, 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 Simmtech Co., Ltd.?

Simmtech Co., Ltd. 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 Simmtech Co., Ltd. ransomware attack occur?

The ransomware attack on Simmtech Co., Ltd. was disclosed on December 16, 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 Simmtech Co., Ltd. ransomware attack?

The specific data stolen from Simmtech Co., 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 Technology organisation, Simmtech Co., Ltd. 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.