This record tracks a ransomware attack claimed by the
lockbit3 group against
oomiya.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.
-84days
t1 · Published
t2 · Disclosed
Published
October 16, 2022
Disclosed / Notified
Jul 25, 2022
Attack Summary
oomiya.co.jp was named by the lockbit3 ransomware group as a targeted organization. It operates in the Other sector. The affected entity is based in Japan. The incident was first observed on October 16, 2022. This record is maintained by Breach House as part of its ongoing monitoring of public ransomware leak sites.
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 oomiya.co.jp
— indexed by HaveIBeenRansom.
1
found in Infostealer logs
42
found in Traditional breaches
5
found in Ransomware leaks
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Collection1_BF.7z.003
formaceft_db · breach
••• emails
Lawrence Semiconductor Research Laboratory
play · ransomware
••• emails
Televerde
play · ransomware
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Japan.rar
🇷🇺Alexei Error504🇷🇺 · breach
••• emails
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 1 source.
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.