This record tracks a ransomware attack claimed by the
thegentlemen group against
TRANSSYSTEM 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.
-34days
t1 · Published
t2 · Disclosed
Business Category
Manufacturing / Engineering
Disclosed / Notified
Apr 21, 2026
Attack Summary
transsystem.pl Polish engineering powerhouse with 30+ years of expertise in designing and manufacturing advanced technological transport systems and steel structures. Delivers turnkey intralogistics solutions for automotive, tire, and industrial sectors, with 200+ successful projects across 30+ countries worldwide. Trusted by global leaders including Tesla, Goodyear, Michelin, Continental, and KUKA for innovation, precision, and operational excellence
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 transsystem.pl
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
46+
found in Traditional breaches
0+
found in Ransomware leaks
AntiPublic_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
MyHeritage_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
LinkedIn.com.txt
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Cushman & Wakefield Inc.
shinyhunters · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
+ 9 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 12 sources.
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.