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

September 6, 2025OftalTech Solutions oftaltech.com listed by blacknevason the group's public leak site

Data size: 1.5 TB
Records: 317286 files

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,524 disclosures indexed across all operators we track. Geographically, OftalTech Solutions oftaltech.com is reported in United States, a country with 7,392 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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OftalTech Solutions oftaltech.com

Claimed by blacknevas · listed 9 months ago

1.5 TB

Data size

317286 files records

Age

since listed · data leaked

Status timeline

Listed
Sep 6, 2025
Data leaked

At a glance

Group: blacknevas
Status: Data leaked
Country: United States
Sector: Technology
Listed on leak site: Sep 6, 2025
Data size: 1.5 TB
Records: 317286 files

About the victim

AI dossier — public-source company profile

OftalTech Solutions is a distributor of ophthalmic products operating at national and international levels, with primary markets in Spain and Portugal. The company supplies diagnostic equipment, surgical devices, and therapeutic lenses to ophthalmologists and eye care professionals. With over 27 years in the market, it serves as a key intermediary between manufacturers and medical practitioners in the field of ophthalmology.

Industry: Ophthalmic Medical Equipment Distribution

Attack summary

Severity: critical — 1.5 TB of 317,286 files exfiltrated from a medical equipment distributor serving ophthalmologists likely contains regulated healthcare-adjacent data, client/patient records, and sensitive business information; data has been fully published with a browsable file list.

The group claims to have exfiltrated approximately 1.5 TB of data comprising 317,286 files from OftalTech Solutions, with a file listing published and individual files available upon request, indicating full data publication rather than encryption-only.

critical

Data the group says was taken

AI dossier — extracted from the leak post

File listing archive (317,286 files)
Business/operational files
Potentially customer and partner records
Potentially medical or clinical documentation

The group's post references roughly 1 proof file.

What the group claims

OftalTech Solutions is a leading distributor of ophthalmic products, operating at both national and international levels, primarily in Spain and Portugal. The company offers a wide range of products including diagnostic equipment, surgical devices, and therapeutic lenses. Their services cater to ophthalmologists, providing essential tools and devices for various eye care procedures. With over 27 years in the market, OftalTech Solutions is dedicated to supporting professionals in the field of ophthalmology.list of files, we will provide any file from the list upon request:https://biteblob.com/Information/jy8iz5kBMTUPik/#oftaltech_file_list.zip317286 files, 1.5 tb size

Sources

Leak posthttp://ctyfftrjgtwdjzlgqh4avbd35sqrs6tde4oyam2ufbjch6oqpqtkdtid.onion/publications/details/8c57c7f1-fd7e-475a-bbd7-9baa517326fe

Source

Indexed 9 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.