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Kurogane Kasei Co.

ransomhouse

This record tracks a ransomware attack claimed by the ransomhouse group against Kurogane Kasei Co.. It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.

Window Zero

EXPOSURE GAP

Window Zero is the time the breach stayed in the open before anyone said so — the gap between when the attack was first discovered on the operator's leak site (t1) and when it was publicly disclosed (t2). The wider this window, the longer victims, staff and customers were exposed with no warning.

327days open
t1 · Published t2 · Pending
Oct 10, 2025Not disclosed yet
Country
Japan
Business Category
Manufacturing / Engineering
Employees
101-1000
Discovered
2025-10-23
Published
October 10, 2025
Disclosed / Notified
Not disclosed yet
Victim ID
ga2m58oBqBHE

Attack Summary

Kurogane Kasei Co., Ltd. is a development-oriented Japanese chemical company specializing in organic synthesis and fine chemicals production. Its core activities include joint R&D projects, entrusted synthesis, and scalable production from gram-level prototypes to ton-scale manufacturing. The company caters to industries such as electronics, pharmaceuticals, and agrochemicals, leveraging advanced technologies like esterification and specialized equipment for dust-free, metal-free environments. With a workforce of about 193 employees, Kurogane Kasei positions itself as an 'all-round player' in the chemical sector, prioritizing customer satisfaction through rapid prototyping and innovative solutions.

Leak Screenshots

SAMPLE

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finance_2024.xlsx
passport_scan.jpg
contract_signed.pdf
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Dark Web Exposure

Cross-referenced against HaveIBeenRansom's dark-web index of ransomware leaks, breaches & infostealer logs.
0
found in Infostealer logs
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found in Traditional breaches
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found in Ransomware leaks
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