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 Dark Eye.
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.
340days open
t1 · Published
t2 · Pending
Business Category
Manufacturing / Engineering
Published
October 10, 2025
Disclosed / Notified
Not disclosed yet
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
1 CAPTURED
Captured directly from the operator's leak site by our collector.
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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
0
found in Traditional breaches
0
found in Ransomware leaks
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••• emails
Full exposure is locked
See every breached email, the internal-vs-external split and each leak source behind this victim.
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This ransomware victim record reflects information published on the operator's leak site.
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