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

April 24, 2026Star Energy Geothermal Salak listed by ransomhouseon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 374 disclosures indexed across all operators we track. Geographically, Star Energy Geothermal Salak is reported in ID, a country with 23 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

Star Energy Geothermal Salak

Claimed by ransomhouse · listed 27 days ago

26d

Age

since listed · data leaked

Status timeline

Listed
Apr 24, 2026
Data leaked

At a glance

Group: ransomhouse
Status: Data leaked
Country: ID
Sector: Energy
Listed on leak site: Apr 24, 2026

About the victim

AI dossier — public-source company profile

Star Energy Geothermal Salak is an Indonesian energy company established in 2003, focused on geothermal power generation and oil & gas exploration. It operates approximately 926 MW of geothermal capacity in West Java, supplying clean renewable energy to Indonesia's national grid. The company is a subsidiary of Barito Renewables and is targeting 2.3 GW of renewable capacity by 2032.

Industry: Geothermal Power Generation & Oil and Gas Exploration
Address: Indonesia (West Java operations; headquarters Jakarta, Indonesia)
Employees: 150
Founded: 2003

Attack summary

Severity: high — Star Energy is a critical energy infrastructure operator supplying Indonesia's national grid with ~926 MW of geothermal capacity. Encryption of systems at such an operator constitutes a high-severity operational threat to critical energy infrastructure, even before confirmed large-scale data exfiltration is published.

RansomHouse claims to have encrypted systems at Star Energy Geothermal Salak on or around 11 April 2026; the post is in an 'EVIDENCE' status with data not yet published, indicating exfiltration or proof has been collected but not yet publicly released.

high

Data the group says was taken

AI dossier — extracted from the leak post

Encrypted internal systems
Operational energy infrastructure data
Corporate business records

What the group claims

Star Energy is an Indonesian energy company focused on geothermal power generation and oil & gas exploration, operating a total of 926 MW of geothermal capacity in West Java. The company supplies clean renewable energy to Indonesia’s national grid while actively expanding its geothermal output toward a 1 GW target. Under its parent company, Barito Renewables, Star Energy has committed significant investment to reach 2.3 GW of renewable capacity by 2032, including wind power assets.

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":"438632"},{"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

Victim sitewww.starenergy.co.id
Leak posthttp://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/starenergy.html

Source

Indexed 27 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.