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 360 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 7, 2026. The operation is currently active.

Timeline of this disclosure

February 1, 2026Hosowaka Micron Group listed by Evereston the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Hosowaka Micron Group is reported in Japan, a country with 108 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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Hosowaka Micron Group

Claimed by Everest · listed 4 months ago

Age

since listed · data leaked

Status timeline

Listed
Feb 1, 2026
Data leaked

At a glance

Group: Everest
Status: Data leaked
Country: Japan
Sector: Manufacturing
Listed on leak site: Feb 1, 2026

About the victim

AI dossier — public-source company profile

Hosowaka Micron Group appears to be a Japanese manufacturing company, likely specializing in precision or micron-scale components based on its name. No public website content was available to confirm operations, scale, or headquarters location. The company is based in Japan and operates in the manufacturing sector.

Industry: Precision Manufacturing / Micron-scale Components

Attack summary

Severity: medium — The disclosure status indicates data has been published, implying confirmed exfiltration, but the leak post contains no detail on data type, volume, or sensitivity, and no regulated or critical data categories can be confirmed from available evidence.

The Everest ransomware group claims an attack against Hosowaka Micron Group, with the disclosure status recorded as data_published, suggesting exfiltrated data has been released or made available. The leak post itself provides no detail on the nature of the data or the extent of the compromise.

medium

Original description

AI-summarised, not from the leak post

Hosokawa Micron Group is a global industrial process machinery manufacturer, providing turn-key solutions for powder processing, particle separation, mixing, drying, containment, compacting and more. Its offerings are used in the chemicals, cosmetics, food, mineral, pharmaceutical and plastics industries. Founded in Osaka, Japan, it operates worldwide with a strong presence in Europe and the Americas.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

Leak posthttp://ransomocmou6mnbquqz44ewosbkjk3o5qjsl3orawojexfook2j7esad.onion/news/Hosowaka_Micron_Group/

Source

Indexed 4 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.