This record tracks a ransomware attack claimed by the
clop group against
cps.k12.il.us. 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.
569days open
t1 · Published
t2 · Pending
Business Category
Education
Published
February 10, 2025
Disclosed / Notified
Not disclosed yet
Attack Summary
[AI generated] cps.k12.il.us is the official website for Chicago Public Schools (CPS), one of the biggest school systems in the U.S., located in Chicago, Illinois. It provides comprehensive information about their various programs, curriculums, school calendars, resources for students and parents, as well as staff directories. CPS's mission is to provide a high-quality public education for every child, in every neighborhood, that prepares each for success in college, career, and civic life.
Leak Screenshots
SAMPLE
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Dark Web Exposure
Findings for cps.k12.il.us
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
2,921+
found in Traditional breaches
79+
found in Ransomware leaks
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Televerde
play · ransomware
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Database World ROC · breach
••• emails
LKnet reserve chat · breach
••• emails
Anonymous Russia БД · breach
••• emails
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