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Kaneko

Claimed by Thegentlemen · listed 6 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedJul 16, 2026
  2. Data leakeddate unknown

At a glance

Group
Thegentlemen
Status
Data leaked
Country
Japan
Listed on leak site
Jul 16, 2026

About the victim

AI dossier — public-source company profile

Kaneko is a Japanese software company based in Itoigawa, Niigata, specializing in construction project management solutions. Over three decades, they have developed the CDPM series, a recognized software for creating and managing complex construction schedules, and recently launched the CDPM-X64 platform with JSON support and advanced analytics.

Industry
Construction Software & Project Management
Address
Itoigawa, Niigata, Japan

Attack summary

Severity: medium — Data has been published (disclosed_status confirms 'data_published'), indicating confirmed exfiltration, but the leak post provides no inventory of sensitive data types, no proof count, and no evidence of PII, financial records, or regulated data at scale. Medium severity reflects confirmed data exposure without clarity on sensitivity or volume.

The thegentlemen group claims to have compromised Kaneko and published data from the breach. The post does not specify whether data was exfiltrated, encrypted, or both, nor does it detail the scope or nature of exposed data.

medium

What the group claims

***.co.jp zoominfo.com/c/kaneko/540044079 Japanese software company based in Itoigawa, Niigata, specializing in construction project management solutions. For over three decades, the company has developed the CDPM series, a widely recognized software for creating and managing complex construction schedules. Recently, the company has been actively driving digital transformation in the construction industry through its advanced CDPM-X64 platform, which introduces innovative features like native JSON support and comprehensive schedule analysis tools

Sources

Source

Indexed 6 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 618 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 16, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

  • July 16, 2026Kaneko listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 618 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

Geographically, Kaneko is reported in Japan, a country with 88 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Kaneko 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.
  • Report the incident to your national CERT, JPCERT/CC (Japan), as required for your jurisdiction.
  • Monitor for the data appearing on thegentlemen'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.