This record tracks a ransomware attack claimed by the
interlock group against
Clarksville ISD. 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.
261days open
t1 · Published
t2 · Pending
Business Category
Education
Published
December 18, 2025
Disclosed / Notified
Not disclosed yet
Attack Summary
clarksvilleisd.net represents a US-based Education sector institution operating under its domain name, providing standard district or school district services including administrative platforms, student information systems, and educational resources. As cataloged in the threat-intelligence index, this entity is designated as a ransomware victim linked to the interlock threat actor group. The listing type identifies the relationship between the organization and the specific cyber threat actor without disclosing unverified incident details such as data exfiltration scope, ransom demands, or confirmed breach specifics. This entry serves threat analysts and security professionals for monitoring Education sector exposure to interlock-associated ransomware activity within the United States.
Leak Screenshots
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Dark Web Exposure
Findings for clarksvilleisd.net
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
354+
found in Traditional breaches
4+
found in Ransomware leaks
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
MySpace_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Exploit.in.rar
LKnet reserve chat · breach
••• emails
McGraw Hill, Inc. (mheducation.com)
shinyhunters · breach
••• emails
TheUnderground - Reborn · breach
••• emails
Database World ROC · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
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