This record tracks a ransomware attack claimed by the
thegentlemen group against
Cosmo Group. 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.
-43days
t1 · Published
t2 · Disclosed
Business Category
Manufacturing / Engineering
Disclosed / Notified
Feb 12, 2026
Attack Summary
cosmo.co.th zoominfo.com/c/cosmo-group-public-co/459326707 Cosmo Group PCL, founded in 1964 and headquartered in Bangkok (Sukhumvit), is a Thai luxury packaging manufacturer with over 60 years of experience. The company specializes in premium gift boxes, displays, watch dials, cases, and accessories for global luxury brands in jewelry, watches, cosmetics, and perfume. With 1,000–5,000 employees and a Swiss sales office (Cosmo Pusterla 1880), Cosmo serves top-tier international clients and holds multiple quality and sustainability certifications
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 cosmo.co.th
— indexed by HaveIBeenRansom.
30
found in Infostealer logs
45+
found in Traditional breaches
0+
found in Ransomware leaks
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
MalindoAir_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
MalindoAir_BF.7z
TheUnderground - Reborn · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Collection1_BF.7z.003
formaceft_db · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
+ 4 more leak sources locked
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This ransomware victim record reflects information published on the operator's leak site.
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