This record tracks a ransomware attack claimed by the
Deadlock group against
FIRESTA. 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.
0days open
t1 · Published
t2 · Pending
Disclosed / Notified
Not disclosed yet
Attack Summary
Firesta-Fišer, a.s. is a Czech construction company based in Brno, established in 1990, specializing in transport infrastructure, including bridge, road, and railway construction. With over 600 employees, the company also operates in Slovakia, Poland, and Romania.
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 firesta.cz
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
166
found in Traditional breaches
7
found in Ransomware leaks
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Расшифровка Badoo.com [25,8kk].rar
Misha-z88 DB · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
MyHeritage_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Pemiblanc.com - Pemiblanc Credential Stuffing List.part16.rar
@mvddsp Reserv · ransomware
••• emails
Deezer_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
+ 16 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.