Disclosure context

About Abyss

Abyss is a relatively new ransomware group that emerged in March 2023, operating with primarily financial motivations and targeting organizations across multiple sectors with a focus on English-speaking countries. The group's origin and affiliations remain largely undocumented by major security agencies, though their targeting patterns suggest they operate independently rather than as a Ransomware-as-a-Service model. Their attack methodology and specific tools have not been extensively documented by major threat intelligence firms, though their victim profile of 87 organizations indicates they employ effective initial access techniques to compromise business services, technology, healthcare, and agriculture sectors. The group demonstrates a clear geographic preference for targets in the United States, United Kingdom, Canada, Switzerland, and Hong Kong, suggesting either language preferences or specific regional access capabilities. Due to the group's recent emergence and relatively limited public documentation from established security researchers, detailed information about notable campaigns, encryption methods, or law enforcement actions remains scarce. Abyss appears to remain active as of current reporting, though the lack of extensive public analysis by major threat intelligence organizations suggests they may operate at a smaller scale compared to more prominent ransomware families. The group has been linked to 98 public disclosures across our corpus. First observed on a leak site on March 21, 2023; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

May 17, 2026Optimum Design (Emerald Technologies) listed by Abysson the group's public leak site

Data size: 795GB uncompressed

Sector and geography

This disclosure adds to ransomware activity in the Engineering sector, which has 5 disclosures indexed across all operators we track. Geographically, Optimum Design (Emerald Technologies) is reported in US, a country with 2,713 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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Optimum Design (Emerald Technologies)

Claimed by Abyss · listed 4 days ago

795GB uncompressed

Data size

Age

since listed · data leaked

Status timeline

Listed
May 17, 2026
Data leaked

At a glance

Group: Abyss
Status: Data leaked
Country: US
Sector: Engineering
Listed on leak site: May 17, 2026
Data size: 795GB uncompressed

About the victim

AI dossier — public-source company profile

Optimum Design Associates, operating as an Emerald Technologies Company, specializes in PCB (printed circuit board) design services for the electronics industry. The company leverages experienced engineering teams and proven methodologies to deliver high-quality electronic design solutions. It is based in the United States and serves clients requiring advanced electronic engineering expertise.

Industry: PCB Design & Electronic Engineering Services

Attack summary

Severity: high — 795 GB of data has been confirmed exfiltrated and published, representing significant business and potentially proprietary engineering data from an electronics design firm; while not explicitly regulated personal or medical data, the scale and confirmed publication of sensitive IP and business records warrants a high severity rating.

The Abyss ransomware group claims to have exfiltrated 795 GB of uncompressed data from Optimum Design (Emerald Technologies) and has published the data, including a downloadable file archive and file listing, on their leak site.

high

Data the group says was taken

AI dossier — extracted from the leak post

Engineering/PCB design files
Business documents
File archive (RAR format)
File listing index

The group's post references roughly 2 proof files.

What the group claims

Optimum Design (an Emerald Technologies Company) specializes in PCB design services, leveraging elite experience and proven methodologies to deliver high-quality electronic engineering solutions. In 2024, the company was acquired by Emerald Technologies. Customers: Amazon, Siemens, Northrop Grumman, Lockheed Martin, Garrett Motion, Teledyne, Viasat and Synopsys.

The leak post

captured from the group's site

```
let data = [
{
        'title' : 'technic.com',
        'short' : 'technic.com ',
        'full' : 'Technic <br>' +
                 'Founded in 1944 and headquartered in Woonsocket, Rhode Island, Technic Inc. is an international supplier of electroplating chemicals and equipment.<br>'+
            'password and data will be published later<br>'+
            'Link â„–1 Filelist',
        'links' : [


        ]
},
{
        'title' : 'thinlinetech.com',
        'short' : 'thinlinetech.com 29Gb uncompressed data',
        'full' : 'Thinline Technologies <br>' +
                 'Thinline Technologies offers reliable IT consulting and expert computer and network support services to businesses in the Baltimore metro area.<br> They specialize in network administration, technology planning, and help desk services, focusing on increasing productivity and profitability for small to mid-size businesses.<br>'+
            'password: 6oGfyIRISQmmI3Ge2kEeyu7hbzONONEFpkcnhC1S4Ygk4iSpw4RRxDXY1uk9xeyUXOmg7UOuZvGekRc9cs8E61LWKdI08uv0kUyC4V6YxaETtrhniAtKD9t7FQ2qTFYi<br>'+
            'Link â„–1 Filelist',
        'links' : [
            "http://zngbsq66uwem4qzyxpqb5rjo2xebnbwdku27nhmquryx6ljnb…

Sources

Victim siteoptimumdesign.com
Leak posthttp://3ev4metjirohtdpshsqlkrqcmxq6zu3d7obrdhglpy5jpbr7whmlfgqd.onion/static/data.js

Source

Indexed 4 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.