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Shinwa Co Ltd

everest

This record tracks a ransomware attack claimed by the everest group against Shinwa Co Ltd. 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.

-83days
t1 · Published t2 · Disclosed
Feb 01, 2026Nov 11, 2025
Country
Japan
Business Category
Construction / Real Estate
Employees
51-100
Discovered
2026-02-01
Published
February 01, 2026
Disclosed / Notified
Nov 11, 2025
Victim ID
UBbOB7A3uelI

Attack Summary

[AI generated] "Shinwa Co Ltd" is a Japan-based company primarily engaged in the civil engineering and construction business. The company's operations include disaster recovery work, civil engineering, and building construction. Its construction business involves the building of private homes, condominiums, and commercial facilities. Shinwa also partakes in real estate buying, selling, and rental activities. They are headquartered in Osaka, Japan.

Leak Screenshots

SAMPLE

Proof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.

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

Findings for shinwa.co.jp — indexed by HaveIBeenRansom.
0
found in Infostealer logs
1
found in Traditional breaches
0
found in Ransomware leaks
Lifebear_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Leak volumes are locked
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