This record tracks a ransomware attack claimed by the
akira group against
MAT 4Site Engineers. 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.
-47days
t1 · Published
t2 · Disclosed
Business Category
Communication / Marketing
Published
December 19, 2025
Disclosed / Notified
Nov 02, 2025
Attack Summary
MAT 4Site specializes in creating optimal building systems tailor
ed to clients' unique needs. They offer a range of services inclu
ding consulting, project planning, engineering, and project manag
ement to support various stages of construction projects.
We will upload 90gb of corporate data soon. Personal documents (d
river licenses and other docs), financials, customer information,
confidential files, numerous project files, etc.
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 mat4site.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
58+
found in Traditional breaches
6+
found in Ransomware leaks
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••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
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Database World ROC · breach
••• emails
Denninger’s
medusa · ransomware
••• emails
Cushman & Wakefield Inc.
shinyhunters · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
CENTAURPRODUCTS.COM
clop · ransomware
••• 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.