This record tracks a ransomware attack claimed by the
sinobi group against
L S GRIM. 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.
-33days
t1 · Published
t2 · Disclosed
Business Category
Services
Published
December 18, 2025
Disclosed / Notified
Nov 16, 2025
Attack Summary
L.S. Grim Consulting Engineers is a Mid-Atlantic-based engineering services corporation specializing in mechanical, electrical, and plumbing engineering design and consulting. They offer a variety of services including electrical systems, fire protection, and project management, all designed to meet code requirements and support LEED certification. With over 30 years of experience, their team focuses on quality control and effective project management to ensure client satisfaction. Their intended clients include organizations needing comprehensive engineering solutions and facilities management.
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 lsgrim.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
57+
found in Traditional breaches
24+
found in Ransomware leaks
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Hedrick Brothers Construction
play · ransomware
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
MySpace_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
extracted_emails.txt
DL| Database catalog · breach
••• emails
+ 10 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.