Ransomware victim disclosure

MEISA - Proyectos y Mantenimientos Mecánicos, Eléctricos y de Instrumentación, S.A.

listed as MEISA - Sines · Claimed by qilin · listed 15 hours ago

Today

Age

since listed · data leaked

Status timeline

Listed
Jun 3, 2026
Data leaked

At a glance

Group: qilin
Status: Data leaked
Country: PT
Sector: Energy
Listed on leak site: Jun 3, 2026

About the victim

AI dossier — public-source company profile

MEISA is a Spanish industrial services company specializing in mechanical, electrical, and instrumentation projects and maintenance. Based in Spain (phone/fax indicate Spanish contact details), the company emphasizes quality, safety, and environmental management in serving industrial clients.

Industry: Industrial Services & Engineering (Mechanical, Electrical, Instrumentation)

Attack summary

Severity: medium — Data has been published by the group (confirmed 'data_published' status), indicating successful exfiltration. However, without visibility into the actual leak post content, proof files, or data inventory details, the sensitivity and scale cannot be fully assessed. Industrial/engineering data typically carries moderate risk unless it includes operational technology details or client information.

Qilin ransomware group claims to have attacked MEISA and published data. No specific details on encryption, exfiltration scope, or data types are provided in the available leak post excerpt.

medium

What the group claims

N/A

Sources

Source

Indexed 15 hours 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.

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Disclosure context

About qilin

Qilin is a ransomware group that emerged in October 2022, operating with primarily financial motivations through targeted attacks against organizations across multiple sectors. The group appears to operate independently with limited public information available regarding their specific country of origin or affiliations to other ransomware families. Qilin employs double extortion tactics, typically exfiltrating sensitive data before deploying their encryption payload, though specific details about their initial access vectors and technical tools remain less documented in public security research. The group has demonstrated a broad targeting approach, with their 1645 known victims spanning multiple countries including the United States, France, Canada, United Kingdom, and Germany, with particular focus on manufacturing, technology, healthcare, and business services sectors. Based on available intelligence reporting, Qilin remains an active threat as of recent assessments, continuing their ransomware operations without significant reported law enforcement disruption. The group has been linked to 1,896 public disclosures across our corpus. First observed on a leak site on October 8, 2022; most recent post June 3, 2026. The operation is currently active.

Timeline of this disclosure

June 3, 2026MEISA - Sines listed by qilinon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 375 disclosures indexed across all operators we track. Geographically, MEISA - Sines is reported in PT, a country with 4 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.