Disclosure context

About beast

The Beast ransomware group is a relatively new threat actor that emerged in July 2025, operating with apparent financial motivations through their ransomware campaigns. With limited public documentation available from major security agencies, the group has demonstrated activity primarily targeting victims across the United States, United Kingdom, Brazil, South Korea, and Argentina, accumulating approximately 65 known victims since their emergence. Their targeting pattern shows a focus on healthcare organizations, manufacturing companies, educational institutions, and construction firms, suggesting an opportunistic approach rather than highly specialized sector expertise. The group's recent emergence means there is insufficient public intelligence from CISA, FBI, Mandiant, or other established security researchers regarding their specific attack methodologies, initial access vectors, or technical capabilities. Given the timeline of their first observation in mid-2025, Beast represents an active and emerging threat with their current operational status remaining unclear due to limited threat intelligence reporting from authoritative sources. The group has been linked to 75 public disclosures across our corpus. First observed on a leak site on July 29, 2025; most recent post May 21, 2026. The operation is currently active.

Timeline of this disclosure

February 24, 2026Sungwoo Co., Ltd listed by beaston the group's public leak site

Ransom demanded: $23.83

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Sungwoo Co., Ltd is reported in South Korea, a country with 32 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

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Sungwoo Co., Ltd

Claimed by beast · listed 3 months ago

$23.83

Ransom

demanded

Age

since listed · data leaked

Status timeline

Listed
Feb 24, 2026
Data leaked

At a glance

Group: beast
Status: Data leaked
Country: South Korea
Sector: Not Found
Listed on leak site: Feb 24, 2026
Ransom demanded: $23.83

About the victim

AI dossier — public-source company profile

Sungwoo Co., Ltd. is a South Korean manufacturer headquartered in Gumi, specializing in safety components for lithium-ion batteries such as Top Cap Assemblies, as well as precision electrical parts for mobile devices and electric vehicles. The company serves as a key supplier in the EV and consumer electronics supply chains and is listed on the KOSDAQ exchange under ticker 458650.

Industry: Secondary Battery Components & Precision Electrical Parts Manufacturing
Address: Gumi, North Gyeongsang Province, South Korea
Founded: 1992

Attack summary

Severity: high — Data has been published by the threat actor against a publicly listed KOSDAQ company that is a key supplier in EV and consumer electronics supply chains; confirmed exfiltration of significant business data from a critical manufacturing supplier warrants high severity, though no specific volume of regulated PII or government/defence data was explicitly confirmed.

The Beast ransomware group claims to have attacked Sungwoo Co., Ltd. and has disclosed data (status: data_published), indicating exfiltration of company data; no ransom amount or specific data volume was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company internal documents
Business data related to battery component manufacturing
Potentially supplier/customer records

What the group claims

Overview: Sungwoo Co., Ltd. is a South Korean manufacturer primarily engaged in the production and sale of secondary battery components (rechargeable batteries). Key Products: The company specializes in safety components for lithium-ion batteries, such as Top Cap Assemblies, which prevent explosions by venting gas and cutting off current during overcharging. They also produce precision electrical parts for mobile devices (like wireless earphones) and electric vehicles (EVs). Market Position: Founded in 1992 and headquartered in Gumi, the company serves as a key supplier in the EV and consumer electronics supply chain. It was recently listed on the KOSDAQ exchange (Ticker: 458650)

The leak post

captured from the group's site

[ 2fORM Architecture specializes in innovative sustainable architecture, offering design services for residential, commercial, and interior projects. Their portfolio includes a diverse range of developments, such as multi-family housing, health care facilities, and various remodels. The company aims to serve clients in the Pacific Northwest, including individual homeowners, businesses, and institutions. With a commitment to sustainability and creativity, 2fORM Architecture enhances the built environment through thoughtful design. ](http://beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion/card/2form_architecture)[ ACMARK s r o is a company that operates in the Repair Services industry. It employs 10to19 people and has 1Mto5M of revenue. The company is headquartered in Brno, South Moravian, Czech Republic. ](http://beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion/card/acmark)[ AJU Pharm Co., Ltd. is a prominent South Korean total healthcare company founded in 1953. For over 70 years, it has evolved from a manufacturer of raw materials into a global pharmaceutical group specializing in prescription drugs, medical devices, and health supplements P U B L I S H…

Screenshot of the leak post

Sources

Victim site-
Leak posthttp://beast6azu4f7fxjakiayhnssybibsgjnmy77a6duufqw5afjzfjhzuqd.onion/card/sungwoo_co___ltd

Source

Indexed 3 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.