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Maxell Asia, Ltd.

listed as Maxell Asia · Claimed by Ransomhouse · listed 11 months ago

743 GB
Data size
$740
Ransom
demanded
10m
Age
since listed · data leaked

Status timeline

  1. ListedAug 19, 2025
  2. Data leakeddate unknown

At a glance

Group
Ransomhouse
Status
Data leaked
Country
Japan
Sector
Technology
Listed on leak site
Aug 19, 2025
Data size
743 GB
Ransom demanded
$740

About the victim

AI dossier — public-source company profile

Maxell Asia, Ltd. is a Hong Kong-based subsidiary of Maxell, a global manufacturer of consumer and industrial products including batteries, audio equipment, data media, adhesive tapes, optical components, and personal care appliances. The company distributes products across Asia-Pacific, Middle East, and Africa regions.

Industry
Consumer Electronics & Industrial Products Manufacturing
Address
Unit Nos. 03B-06, 13/F, No.909 Cheung Sha Wan Road, Cheung Sha Wan, Kowloon, Hong Kong

Attack summary

Severity: medium — 743 GB of data volume suggests significant exfiltration; however, the leak post appears to be a general index mixing many unrelated victims (Trellix, Chevrolet, Zenergy, etc.), making it unclear what proportion is actually Maxell-specific. No clear proof files or specific data categories are identified as belonging to Maxell.

Ransomware group Ransomhouse claims to have encrypted Maxell Asia's systems. The group is listing the victim on its leak site with 743 GB of data allegedly exfiltrated, though the post structure suggests this may be a compilation of multiple victims rather than Maxell-specific data.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Business documents
  • Operational records

What the group claims

Maxell is a Japanese group company founded in 1961, renowned for developing innovative, high-value-added products leveraging its core analog technologies such as mixing and dispersion, precision coating, and high-precision molding. With a global presence including subsidiaries in the USA, Europe, Asia, and authorized resellers worldwide, Maxell focuses on divisions like Energy and Functional Materials, delivering solutions in areas such as healthcare, 5G/IoT, mobility, and everyday consumer goods. The company's mission is to address social challenges, contribute to a sustainable society, and enrich lives by creating Maximum Excellence through surprising innovations that exceed expectations.

The leak post

captured from the group's site
```
{"data":[{"id":"a1894b76b7004c75a3a0845799af49956592e3d9","display":"animated","header":"HOT NEWS","info":" Trellix is a global cybersecurity company.","url":"","sort":1,"views":"436242"},{"id":"336b257f582b17573c97578efd4b22762bf77344","sort":2,"header":"Trellix (McAfee & FireEye)","url":"https://www.trellix.com/","private":"false","revenue":"1.5-2 B$","employees":"5000","info":"Trellix is a global cybersecurity company formed from the October 2021 merger of McAfee Enterprise and FireEye. It provides services to over 50,000 business and government customers worldwide, protecting more than 200 million endpoints. The companys open and native extended detection and response (XDR) platform helps organizations confronted by todays most advanced threats gain confidence in the protection and resilience of their operations. Trellix, along with an extensive partner ecosystem, accelerates technology innovation through machine learning and automation to empower over 40,000 business and government customers with living security","statusDate":"DEPENDS ON YOU","status":"EVIDENCE","published":"NOT YET","action":"Encrypted","actionDate":"17/04/2026","volume":"~","content":"cybersecurity.html"…

Sources

Source

Indexed 11 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 Ransomhouse

Ransomhouse is a ransomware group that emerged in June 2021, operating primarily for financial gain through extortion campaigns targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their operational patterns suggest they function as an independent cybercriminal organization rather than a traditional ransomware-as-a-service model. Ransomhouse employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publish the information on their leak site if victims refuse to pay the demanded ransom. The group has demonstrated a broad targeting approach, with documented attacks against 187 victims primarily concentrated in the United States, China, United Kingdom, Italy, and Spain, focusing heavily on healthcare, technology, business services, and manufacturing sectors. While specific high-profile campaigns have not been extensively documented by major security firms, the group's consistent victim count and geographic distribution indicate sustained operational capability since their emergence. As of current reporting, Ransomhouse remains active with no known major law enforcement disruptions or confirmed rebranding efforts. The group has been linked to 210 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post June 29, 2026. The operation is currently active.

Also tracked as: RANSOM HOUSE.

Timeline of this disclosure

  • August 19, 2025Maxell Asia listed by Ransomhouseon the group's public leak site
Data size
743 GB
Ransom demanded
$740

Other recent disclosures by Ransomhouse

Ransomhouse has been linked to 210 public victims on Darkfield. A sample of the most recent:

See the full Ransomhouse dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, Maxell Asia is reported in Japan, a country with 220 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomhouse means Maxell Asia 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, JPCERT/CC (Japan), as required for your jurisdiction.
  • Monitor for the data appearing on Ransomhouse'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.