This record tracks a ransomware attack claimed by the
qilin group against
northernconstruction.com. 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.
-55days
t1 · Published
t2 · Disclosed
Business Category
Construction / Real Estate
Published
August 12, 2025
Disclosed / Notified
Jun 18, 2025
Attack Summary
Northern Construction Service, LLC is a Massachusetts-based general contractor specializing in bridge construction, construction site work, port and harbor work, concrete work, and utility services.
1.The document consists of two invoices fr ...
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 northernconstruction.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
246+
found in Traditional breaches
114+
found in Ransomware leaks
Tocci Building Corporation
medusa · ransomware
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
Arandell Corp
medusa · ransomware
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
All States Materials Group
play · ransomware
••• emails
Colonial Surety Company
medusa · ransomware
••• emails
+ 17 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 20 sources.
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.