This record tracks a ransomware attack claimed by the
Deadlock group against
Muzeum Valassko. 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.
57days open
t1 · Published
t2 · Pending
Business Category
NGOs / Associations
Leak Status
pending
checked 2026-09-02
Disclosed / Notified
Not disclosed yet
Attack Summary
Muzeum regionu Valašsko (The Museum of the Wallachian Region) is a multi-site cultural institution in the Zlín Region of the Czech Republic.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-09-02. Verdict evidence: [M1] HTTP 403
Showing the latest capture only
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Dark Web Exposure
Findings for muzeumvalassko.cz
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
50+
found in Traditional breaches
2+
found in Ransomware leaks
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
AntiPublic_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
2844Breaches_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
@mvddsp Reserv · ransomware
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
+ 4 more leak sources locked
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