This record tracks a ransomware attack claimed by the
lockbit3 group against
ryokikogyo.co.jp. 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.
-37days
t1 · Published
t2 · Disclosed
Published
November 22, 2022
Disclosed / Notified
Oct 17, 2022
Attack Summary
Ryoki Kogyo Co., Ltd. operates in Japan and is associated with mechanical systems and environmental equipment work, including air-conditioning, plumbing, heating, and related installation services. Public company profiles also describe the business as focusing on creating comfortable living and working environments through refrigeration and building-systems services. The domain ryokikogyo.co.jp corresponds to the company’s corporate presence in Japan. It was listed as a ransomware victim associated with LockBit3.
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.
Dark Web Exposure
Findings for ryokikogyo.co.jp
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
40+
found in Traditional breaches
0+
found in Ransomware leaks
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
2844Breaches_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Peatix_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
MGM_Grand_Hotels RUTOR.7z
TheUnderground - Reborn · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Twitter Full DB.part01.rar
Database World ROC · breach
••• emails
+ 4 more leak sources locked
Leak volumes are locked
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Legal Disclaimer:
This ransomware victim record reflects information published on the operator's leak site.
Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.