Disclosure context

About yurei

Yurei is an emerging ransomware group first observed in September 2025, operating with apparent financial motivations based on their targeting patterns and victim selection. The group's origin and potential affiliations remain unclear due to limited public documentation, though their diverse geographical targeting across Switzerland, Sri Lanka, and Nigeria suggests either opportunistic attacks or access to varied initial compromise vectors. Given the recent emergence and limited intelligence available, their attack methodology, specific tools, and encryption techniques have not been extensively documented by major security firms or government agencies. The group appears to focus on energy sector targets where data is available, though their small victim count of three documented cases suggests they are either highly selective, newly operational, or operating below the radar of major threat intelligence providers. Yurei remains active as of their recent emergence, though the limited public intelligence makes it difficult to assess their operational tempo, sophistication level, or long-term persistence in the ransomware landscape. The group has been linked to 3 public disclosures across our corpus. First observed on a leak site on September 5, 2025; most recent post September 9, 2025. The operation is currently inactive.

Timeline of this disclosure

September 9, 2025noblecorp.net listed by yureion 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, noblecorp.net is reported in Switzerland, a country with 78 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

Noble Corporation

listed as noblecorp.net · Claimed by yurei · listed 8 months ago

Age

since listed · data leaked

Status timeline

Listed
Sep 9, 2025
Data leaked

At a glance

Group: yurei
Status: Data leaked
Country: Switzerland
Sector: Energy
Listed on leak site: Sep 9, 2025

About the victim

AI dossier — public-source company profile

Noble Corporation is an Indian industrial insulation and materials supply company founded in 1935. The company provides thermal and acoustic insulation as well as industrial pipe and equipment solutions for commercial, industrial, and infrastructure projects across India. It serves the manufacturing, construction, and energy sectors and is described as one of India's most trusted insulation solution providers.

Industry: Industrial Insulation & Materials Supply
Address: India (specific address not stated)
Founded: 1935

Attack summary

Severity: high — Data has been published (disclosed status: data_published) by the threat actor, indicating confirmed exfiltration and public release of company data. While the specific data types are not enumerated, the company operates across industrial and infrastructure sectors with likely sensitive business and client data at stake.

The Yurei ransomware group claims to have attacked Noble Corporation and has disclosed the status as data_published, indicating exfiltration and/or publication of data, though specific details on encryption or the volume of exfiltrated data are not stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business/operational data
Potentially client and project records
Potentially financial records

What the group claims

Noble Corporation is a leading industrial insulation and materials supply company based in India, renowned for its expertise, innovation, and dedication to quality. Established in 1935, the company has steadily expanded its presence across the country, earning a strong reputation as one of the most trusted providers of insulation solutions for commercial, industrial, and infrastructure projects. From thermal and acoustic insulation to complex industrial pipe and equipment solutions, Noble Corp has become a household name among India’s manufacturing, construction, and energy sectors.

Sources

Source

Indexed 8 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.