This record tracks a ransomware attack claimed by the
qilin group against
CIMEXSTEEL.CZ. 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.
-48days
t1 · Published
t2 · Disclosed
Business Category
Manufacturing / Engineering
Published
August 07, 2025
Disclosed / Notified
Jun 20, 2025
Attack Summary
The Czech holding company CS STEEL a.s. manufactures and sells metal structures for private and public sector clients. A small company that failed to protect its infrastructure has put dozens of its clients at risk. These are not private indi ...
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 cssteel.cz
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
8
found in Traditional breaches
0
found in Ransomware leaks
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Leak volumes are locked
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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.