This record tracks a ransomware attack claimed by the
thegentlemen group against
Taiwan Otsuka Pharmaceutical. 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.
2days open
t1 · Published
t2 · Pending
Business Category
Manufacturing / Engineering
Indexed by Breach House
October 16, 2026
Disclosed / Notified
Not disclosed yet
Attack Summary
otsuka.com.tw is a Taiwan-based entity operating within the manufacturing and engineering sector, providing industrial technology, equipment, and engineering-related solutions for domestic and international markets. The organization serves production, design, and technical-service workflows typical of advanced manufacturing environments. In the threat-intelligence index, otsuka.com.tw is listed as a ransomware victim associated with thegentlemen, a threat actor operating with documented cyber intrusions targeting industrial and enterprise infrastructure. This listing reflects the entity's inclusion in ransomware victim records tied to thegentlemen activity, without confirming specific stolen data, ransom demands, or incident details. The entry supports security teams monitoring manufacturing and engineering organizations in Taiwan for potential ransomware exposure and threat correlation.
Leak Screenshots
SAMPLE
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Dark Web Exposure
Findings for otsuka.com.tw
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
158+
found in Traditional breaches
0+
found in Ransomware leaks
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Full Clouds Cit0day_2.7z.001
DBs w MTDT · breach
••• emails
OnlinerSpambot_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
Collection1_BF.7z.003
formaceft_db · breach
••• emails
LKnet reserve chat · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
Database World ROC · breach
••• emails
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