This record tracks a ransomware attack claimed by the
killsec group against
grade results. 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.
-85days
t1 · Published
t2 · Disclosed
Business Category
Communication / Marketing
Published
December 24, 2025
Disclosed / Notified
Oct 01, 2025
Attack Summary
Price ??? Disclosures 0/1
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 graderesults.com
— indexed by HaveIBeenRansom.
159
found in Infostealer logs
135+
found in Traditional breaches
23+
found in Ransomware leaks
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
CSCGLOBAL.COM
clop · ransomware
••• emails
Dropbox_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
McGraw Hill, Inc. (mheducation.com)
shinyhunters · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Mathway_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
+ 17 more leak sources 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.