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MIHANA Seisakusho Co., Ltd.

listed as mihana-v.com · Claimed by Dragonforce · listed 11 days ago

11d
Age
since listed · data leaked

Status timeline

  1. ListedJun 22, 2026
  2. Data leakeddate unknown

At a glance

Group
Dragonforce
Status
Data leaked
Country
Russia
Listed on leak site
Jun 22, 2026

About the victim

AI dossier — public-source company profile

MIHANA Seisakusho Co., Ltd. is a Japanese manufacturer specializing in safety valves and relief valves for industrial applications. Based in Osaka, the company is known for proprietary full-bore safety valve technology designed to eliminate front leakage and handle high-pressure environments. They offer a range of products including lift-type safety valves, adjustable relief valves, and sanitary safety valves.

Industry
Industrial Safety Valves & Relief Valves Manufacturing
Address
4270-8 Kokubu-Higanjocho, Kashiwara-city, Osaka 582-0023, Japan

Attack summary

Severity: low — Post appears to be listing/announcement with generic reference to 'corporate overview' materials. No concrete proof files, screenshots, or sensitive data categories (PII, financial, trade secrets) are demonstrated. No operational disruption stated.

The dragonforce group claims to have compromised MIHANA Seisakusho and published data. No specific details on the nature of exfiltration, encryption, or operational impact are stated in the available post excerpt.

low

Data the group says was taken

AI dossier — extracted from the leak post
  • Corporate profiles
  • Technical catalogs
  • Industrial registries

What the group claims

Here is the comprehensive corporate overview of MIHANA Seisakusho Co., Ltd. based on their official company profiles, technical catalogs, and industrial registries

Sources

Source

Indexed 11 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.

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Disclosure context

About Dragonforce

Dragonforce is a relatively new ransomware group that emerged in December 2023, operating with apparent financial motivations based on their targeting patterns and victim selection. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their rapid accumulation of 439 documented victims suggests either sophisticated capabilities or possible connections to existing ransomware infrastructure. Based on their targeting patterns across diverse sectors including manufacturing, business services, technology, and construction, Dragonforce appears to employ opportunistic attack methodologies, though specific initial access vectors, encryption methods, and extortion tactics have not been publicly detailed by major security firms or law enforcement agencies. The group has demonstrated a preference for targeting organizations primarily in English-speaking countries and Western Europe, with the United States, United Kingdom, Germany, Australia, and Italy representing their most frequent victim locations, suggesting possible language capabilities or geographic operational preferences. As of current reporting, Dragonforce appears to remain active given their recent emergence and ongoing victim acquisition, though the lack of detailed public analysis from major threat intelligence organizations indicates either operational security measures that have limited researcher visibility or that the group has not yet conducted sufficiently high-profile attacks to warrant extensive public documentation by CISA, FBI, or established security research firms. The group has been linked to 606 public disclosures across our corpus. First observed on a leak site on December 13, 2023; most recent post June 29, 2026. The operation is currently active.

Also tracked as: DRAGON FORCE.

Timeline of this disclosure

  • June 22, 2026mihana-v.com listed by Dragonforceon the group's public leak site

Other recent disclosures by Dragonforce

Dragonforce has been linked to 606 public victims on Darkfield. A sample of the most recent:

See the full Dragonforce dossier →

Sector and geography

Geographically, mihana-v.com is reported in Russia, a country with 28 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Dragonforce means mihana-v.com 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 Dragonforce'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.