This record tracks a ransomware attack claimed by the
blacklock group against
ATD-American. 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.
133days
t1 · Published
t2 · Disclosed
Business Category
Healthcare / Pharma
Published
November 18, 2024
Disclosed / Notified
Apr 01, 2025
Attack Summary
[AI generated] ATD-American is a Pennsylvania-based company that serves customers globally by supplying them with office, school, and institutional furniture. Their wide product range includes desks, chairs, and cubicles for offices; classroom and dormitory furniture for schools; and beds, lockers for healthcare facilities and correctional institutions. It also offers customized solutions to suit specific needs.
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 atd-american.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
78+
found in Traditional breaches
16+
found in Ransomware leaks
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••• emails
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Database World ROC · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
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••• emails
Marcus & Millichap, Inc.
shinyhunters · breach
••• emails
Hedrick Brothers Construction
play · ransomware
••• emails
Access Intelligence
play · ransomware
••• emails
+ 13 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.