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Matiss

Claimed by Everest · listed 11 months ago

11m
Age
since listed · data leaked

Status timeline

  1. ListedAug 17, 2025
  2. Data leakeddate unknown

At a glance

Group
Everest
Status
Data leaked
Country
Latvia
Listed on leak site
Aug 17, 2025

About the victim

AI dossier — public-source company profile

Matiss is a company based in Latvia with no publicly available website or identifiable business description in the available data.

Attack summary

Severity: low — Data has been published, but the leak post is heavily truncated with no visible proof files, data descriptions, or operational impact details. Insufficient evidence of sensitive/regulated data exposure.

Everest group claims to have attacked Matiss and published data, though the specific attack vector (encryption, exfiltration, or both) and data categories are not detailed in the truncated leak post.

low

Original description

AI-summarised, not from the leak post

"Matiss" is a company that specializes in automation and robotics. Its operations span various sectors including food processing, packaging, and logistics. Matiss's main products include robotic pick and place systems, conveyor systems, and sorting systems. The company is known for using advanced technology to improve efficiency and productivity for their clients. They provide end-to-end automation solutions, from initial design to installation and maintenance.

The leak post

captured from the group's site
Everest Group Everest Group News About the project Жалоба © 2026, All rights reserved ☀ ☾

Sources

Source

Indexed 11 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.

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Disclosure context

About Everest

Everest is a financially-motivated ransomware group that emerged in September 2021, operating with a focus on profit-driven extortion campaigns against organizations primarily in the United States and Europe. The group's country of origin and specific affiliations remain undocumented in public threat intelligence reporting, though their operational patterns suggest they likely operate as an independent entity rather than a formal ransomware-as-a-service model. Limited public documentation exists regarding Everest's specific attack methodologies, initial access vectors, or technical capabilities, though their victim profile indicates they employ standard ransomware tactics targeting a diverse range of sectors including healthcare, technology, business services, and manufacturing organizations. Since their emergence, Everest has claimed responsibility for attacks against 339 victims across multiple countries, with the United States, United Kingdom, Italy, Germany, and Spain representing their primary geographic targets, though no specific high-profile incidents or major ransoms have been publicly documented by law enforcement or major security firms. As of current reporting, Everest appears to remain an active threat actor, though the limited public intelligence available suggests they operate as a lower-tier ransomware group compared to more prominent and well-documented criminal organizations. The group has been linked to 369 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 29, 2026. The operation is currently active.

Timeline of this disclosure

  • August 17, 2025Matiss listed by Evereston the group's public leak site

Other recent disclosures by Everest

Everest has been linked to 369 public victims on Darkfield. A sample of the most recent:

See the full Everest dossier →

Sector and geography

Geographically, Matiss is reported in Latvia, a country with 3 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Everest means Matiss appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Monitor for the data appearing on Everest's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.