Disclosure context

About blacknevas

Blacknevas is an emerging ransomware group that was first observed in August 2025, appearing to be primarily financially motivated based on their targeting patterns and operational characteristics. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their diverse geographic targeting suggests either a distributed operation or broad opportunistic approach. Based on available victim data, Blacknevas has compromised at least 23 organizations across multiple countries, with the United States, Spain, India, Japan, and Thailand being the most frequently targeted nations, while their sector focus spans technology, manufacturing, energy, and consumer services industries, suggesting they employ opportunistic rather than sector-specific targeting methodologies. The group's attack vectors, specific tools, and whether they operate as a Ransomware-as-a-Service model or maintain independent operations have not been publicly documented by major cybersecurity firms or government agencies. Due to the group's recent emergence in August 2025, there is insufficient public reporting from established sources like CISA, FBI, or major threat intelligence providers to detail notable campaigns or significant attacks beyond the confirmed victim count. Given the recency of their first observed activity, Blacknevas appears to remain active as of late 2025, though comprehensive threat intelligence profiles from authoritative sources have yet to be published. The group has been linked to 31 public disclosures across our corpus. First observed on a leak site on August 6, 2025; most recent post April 30, 2026. The operation is currently active.

Also tracked as: black nevas.

Timeline of this disclosure

August 6, 2025CLEARSYNTH LABS LIMITED listed by blacknevason the group's public leak site

Data size: 762 GB
Records: 2153940 file

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, CLEARSYNTH LABS LIMITED is reported in India, a country with 255 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

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CLEARSYNTH LABS LIMITED

Claimed by blacknevas · listed 10 months ago

762 GB

Data size

2153940 file records

Age

since listed · data leaked

Status timeline

Listed
Aug 6, 2025
Data leaked

At a glance

Group: blacknevas
Status: Data leaked
Country: India
Sector: Manufacturing
Listed on leak site: Aug 6, 2025
Data size: 762 GB
Records: 2153940 file

About the victim

AI dossier — public-source company profile

Clearsynth Labs Limited is a technology-driven pharmaceutical and specialty chemical company based in Mumbai, India. They specialize in deuterium science, isotopically labeled compounds, certified reference materials, custom chemistry, and research solutions serving drug discovery, analytical, and regulated pharmaceutical workflows globally.

Industry: Pharmaceutical & Chemical Manufacturing - Deuterium Science & Isotope Labeling
Address: 17, Lotus Business Park, Andheri West, Mumbai - 400 053, India

Attack summary

Severity: critical — Confirmed exfiltration of 762 GB including proprietary pharmaceutical R&D (formulas, medicinal product research), employee PII, and commercial data from a regulated pharmaceutical/chemical manufacturer. Data is already published with download links provided. Scope and sensitivity of pharmaceutical development data poses significant competitive, regulatory, and privacy risks.

The blacknevas group claims to have exfiltrated 2.15 million files totaling 762 GB, including R&D formulas, medicinal product research, drug development data, employee personal information, and sales/project details. The group has published a data sample link and is soliciting buyers.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Drug formulas and development documents
Medicinal product research data
Employee personal data
Sales information
Project details
R&D documentation

What the group claims

In stock: 2153940 filedata size: 762GB Developments, formulas, research on medicinal products Personal data of employees, info on sales and projects. List of files, to confirm that we have all the files, you can request several files from the list and we will provide them to you. https://gofile.io/d/9w9WwEWe ask all our partners, friends and clients to contact us to discuss the acquisition of this data. You know the contacts. For new members, please wait in the Contacts tab. Advertising: We are always ready to cooperate in any form, do you need specific data? We will try to provide it to you as soon as possible, we will receive and download your competitors' data, provide a list of what you are interested in. We are also ready to cooperate with law firms and data leak victims. We will provide all the information you need about the company that was negligent and provided access to data to its clients.

Sources

Source

Indexed 10 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.