This record tracks a ransomware attack claimed by the
metaencryptor group against
Nippon Steel Corporation. 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.
0days open
t1 · Published
t2 · Pending
Business Category
Manufacturing / Engineering
Published
September 15, 2026
Leak Status
pending
checked 2026-09-15
Disclosed / Notified
Not disclosed yet
Attack Summary
www.nipponsteel.com represents Nippon Steel Corporation, a prominent Japanese enterprise operating within the manufacturing and engineering sectors. The organization provides steel products, industrial solutions, and engineering services, maintaining a significant presence in Japan's industrial landscape. This entity has been cataloged in the threat-intelligence index under the listing type ransomware victim, with the associated threat actor identified as metaencryptor. The designation reflects the cybersecurity context in which this organization was documented within the intelligence repository. This entry serves as a reference point for threat analysts monitoring ransomware activity across industrial sectors in Japan.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-09-15. Verdict evidence: [M1] No files available yet. Files for this campaign have not been published yet.
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Dark Web Exposure
Findings for nipponsteel.com
— indexed by HaveIBeenRansom.
10
found in Infostealer logs
8
found in Traditional breaches
86
found in Ransomware leaks
NCH.COM
clop · ransomware
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
Collection1_BF.7z.003
formaceft_db · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
LKnet reserve chat · breach
••• emails
LKnet reserve chat · breach
••• emails
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