Disclosure context

About gunra

Gunra is an emerging ransomware group that was first observed in April 2025, operating with primarily financial motivations based on their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear due to limited public documentation from major security vendors, though their geographic targeting suggests possible international operations given their focus on victims across Brazil, South Korea, Japan, Canada, and Egypt. With approximately 20 known victims to date, Gunra appears to follow conventional ransomware attack methodologies typical of financially-motivated cybercriminal groups, though specific technical details regarding their initial access vectors, encryption methods, or use of double extortion tactics have not been publicly documented by major threat intelligence sources. The group demonstrates opportunistic targeting behavior, focusing primarily on manufacturing organizations while also compromising entities in healthcare, technology, and financial services sectors, suggesting they may operate opportunistically rather than with highly specialized sector expertise. Given the recent emergence of this group in April 2025 and limited public reporting from established threat intelligence organizations such as CISA, FBI, or major security vendors, Gunra's current operational status, technical capabilities, and long-term threat trajectory require continued monitoring as more intelligence becomes available. The group has been linked to 36 public disclosures across our corpus. First observed on a leak site on April 23, 2025; most recent post April 8, 2026. The operation is currently active.

Timeline of this disclosure

April 8, 2026Diamond listed by gunraon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Diamond is reported in FR, a country with 238 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

Diamond (Le Caillebotis Diamond)

listed as Diamond · Claimed by gunra · listed 1 month ago

42d

Age

since listed · data leaked

Status timeline

Listed
Apr 8, 2026
Data leaked

At a glance

Group: gunra
Status: Data leaked
Country: FR
Sector: Not Found
Listed on leak site: Apr 8, 2026

About the victim

AI dossier — public-source company profile

Diamond, operating under the brand 'Le Caillebotis Diamond', is a French manufacturer specializing in standard and custom metal grating (caillebotis métallique). The company operates from France and sells products both in standard formats and as bespoke solutions. Their website includes an e-commerce component for ordering industrial flooring and grating products.

Industry: Metal Grating & Industrial Flooring Manufacturing

Attack summary

Severity: medium — Data is marked as published (exfiltrated and released), but no data categories, volume, or sensitive regulated data types are confirmed from the leak post. The victim is a small French industrial manufacturer with no indication of critical infrastructure or large-scale PII at stake.

The Gunra ransomware group claims to have compromised Diamond (le-caillebotis-diamond.fr) and lists the disclosure status as data_published, indicating exfiltration and publication of company data. No specific data categories or ransom amount were stated in the leak post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Published company data (specifics unspecified)

Original description

AI-summarised, not from the leak post

N/A

Sources

Source

Indexed 1 month 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.