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Sungwoo Co., Ltd.

Claimed by Beast · listed 3 months ago

2m
Age
since listed · data leaked

Status timeline

  1. ListedMay 29, 2026
  2. Data leakeddate unknown

At a glance

Group
Beast
Status
Data leaked
Country
South Korea
Sector
Manufacturing
Listed on leak site
May 29, 2026

About the victim

AI dossier — public-source company profile

Sungwoo Co., Ltd. is a South Korean manufacturer of secondary battery components, specializing in safety devices for lithium-ion batteries such as Top Cap Assemblies, as well as precision electrical parts for mobile devices and electric vehicles. Founded in 1992 and headquartered in Gumi, the company is a key supplier in the EV and consumer electronics supply chain and is listed on the KOSDAQ exchange.

Industry
Battery Components & Precision Electronics Manufacturing
Address
Gumi, South Korea
Founded
1992

Attack summary

Severity: high — Confirmed data exfiltration from a publicly-listed manufacturer in critical supply chains (EV, consumer electronics, batteries). Data publication indicates operational impact and business disruption risk, though specific data sensitivity cannot be fully assessed from the post alone.

The beast group claims to have exfiltrated data from Sungwoo Co., Ltd. The group has published the stolen data but no specific details on data categories or operational impact are provided in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Business records
  • Manufacturing data
  • Supply chain information

What the group claims

South Korean manufacturer primarily engaged in the production and sale of secondary battery components (rechargeable batteries). Specializes in safety components for lithium-ion batteries such as Top Cap Assemblies, and precision electrical parts for mobile devices and electric vehicles (EVs). Founded in 1992, headquartered in Gumi, listed on the KOSDAQ exchange (Ticker: 458650).

The leak post

captured from the group's site
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)
P U B L I S H E D

Screenshot of the leak post

Leak screenshot for Sungwoo Co., Ltd.

Sources

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.

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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 106 public disclosures across our corpus. First observed on a leak site on July 29, 2025; most recent post August 25, 2026. The operation is currently active.

Timeline of this disclosure

  • May 29, 2026Sungwoo Co., Ltd. listed by beaston the group's public leak site

Other recent disclosures by beast

beast has been linked to 106 public victims on Darkfield. A sample of the most recent:

See the full beast dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,692 disclosures indexed across all operators we track. Geographically, Sungwoo Co., Ltd. is reported in South Korea, a country with 48 ransomware disclosures in our corpus.

If your organisation is affected

A listing by beast means Sungwoo Co., Ltd. appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, KrCERT/CC (South Korea), as required for your jurisdiction.
  • Monitor for the data appearing on beast's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.