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 18, 2026Posen Architects listed by Abysson the group's public leak site

Data size: 29 GB
Ransom demanded: $50

Sector and geography

This disclosure adds to ransomware activity in the Architecture sector.

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

Posen Architects

Claimed by Abyss · listed 3 days ago

29 GB

Data size

$50

Ransom

demanded

Age

since listed · listed for ransom

Status timeline

Listed
May 18, 2026

Current state: Listed for ransom

At a glance

Group: Abyss
Status: Listed for ransom
Sector: Architecture
Listed on leak site: May 18, 2026
Data size: 29 GB
Ransom demanded: $50

About the victim

AI dossier — public-source company profile

Posen Architects is an architecture firm. Based on the victim name and sector classification, the firm likely provides architectural design and planning services. No public site content was available to confirm further details about their location, scale, or specific specialisations.

Industry: Architecture & Design

Attack summary

Severity: high — 724 GB of uncompressed data is a substantial exfiltration from an architecture firm, likely containing proprietary project designs, client contracts, and potentially sensitive building/infrastructure data; the group claims data is already publicly released.

The Abyss ransomware group claims to have exfiltrated 724 GB of uncompressed data from Posen Architects and states the data is now freely published. No details about encryption are mentioned in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Architectural project files
Business documents
Potentially client records

What the group claims

Mentioned alongside Promise Technology, Inc. in the leak listing.

The leak post

captured from the group's site

We publish the data that is now freely available! 
##### In the depths of software development. Unlocking the secrets of Promise Technology, Inc.
Today we publish the first part from a major leak at Promise Technology, Inc.
Contact for communication. TOX: 01D33073173C72E543DDCD6895EAE05A57CFDF7B7D906FB99FCD0F26C335290050EA900F8FDA 
Posen Architects 724Gb uncompressed data

Screenshot of the leak post

Sources

Leak posthttp://3ev4metjirohtdpshsqlkrqcmxq6zu3d7obrdhglpy5jpbr7whmlfgqd.onion

Source

Indexed 3 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.