This record tracks a ransomware attack claimed by the
qilin group against
HALLEONARD. 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.
-87days
t1 · Published
t2 · Disclosed
Business Category
Communication / Marketing
Published
January 08, 2024
Disclosed / Notified
Oct 14, 2023
Attack Summary
We are a subsidiary of Hal Leonard Corporation who, founded in 1947, is the world leader in the print music industry. Selling products in more than 65 countries around the world, Hal Leonard Corporation represents in print some of the world's ...
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 halleonard.com.au
— indexed by HaveIBeenRansom.
10
found in Infostealer logs
118+
found in Traditional breaches
3+
found in Ransomware leaks
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+ 16 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.