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 202 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post May 8, 2026. The operation is currently active.

Timeline of this disclosure

May 7, 2026Jiangsu Zenergy Battery Technologies Group Co., Ltd. listed by Ransomhouseon the group's public leak site

Data size: 743 GB
Ransom demanded: $740

Sector and geography

This disclosure adds to ransomware activity in the manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Jiangsu Zenergy Battery Technologies Group Co., Ltd. is reported in China, a country with 29 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

← All victims

Jiangsu Zenergy Battery Technologies Group Co., Ltd.

Claimed by Ransomhouse · listed 13 days ago

743 GB

Data size

$740

Ransom

demanded

13d

Age

since listed · data leaked

Status timeline

Listed
May 7, 2026
Data leaked

At a glance

Group: Ransomhouse
Status: Data leaked
Country: China
Sector: manufacturing
Listed on leak site: May 7, 2026
Data size: 743 GB
Ransom demanded: $740

About the victim

AI dossier — public-source company profile

Jiangsu Zenergy Battery Technologies Group Co., Ltd. is a Chinese lithium-ion battery manufacturer founded in 2019, specializing in traction batteries for electric vehicles, energy storage systems, and aviation batteries. The company offers end-to-end solutions from individual cells to integrated battery packs and battery management systems. In 2024 it turned profitable for the first time and listed on the Hong Kong Stock Exchange in April 2025, reporting approximately $550 million in revenue.

Industry: Lithium-Ion Battery Manufacturing (EV & Energy Storage)
Employees: 5500
Founded: 2019

Attack summary

Severity: high — 743 GB of data has been published by the group, confirming exfiltration at significant scale from a publicly listed manufacturing company with sensitive battery technology IP and operational data; however, no confirmed regulated PII (medical, government, defence) dataset is specifically identified, keeping this at high rather than critical.

RansomHouse claims to have encrypted systems belonging to Jiangsu Zenergy Battery Technologies and has published 743 GB of exfiltrated data. The disclosed status is listed as 'data_published', indicating the stolen data has been released.

high

Data the group says was taken

AI dossier — extracted from the leak post

Encrypted corporate files
Exfiltrated proprietary business data
Potentially battery technology/IP documentation
Financial records
Employee/operational data

What the group claims

Zenergy is a Chinese lithium-ion battery manufacturer founded in 2019, specializing in traction batteries for electric vehicles (EVs), energy storage systems (ESS), and aviation batteries.

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"…

Screenshot of the leak post

Leak screenshot for Jiangsu Zenergy Battery Technologies Group Co., Ltd.

Sources

Victim sitehttps://www.zenergy.cn/
Leak posthttp://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/a

Source

Indexed 13 days 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.