This record tracks a ransomware attack claimed by the
sarcoma group against
CARSTAR Business Group. 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.
-64days
t1 · Published
t2 · Disclosed
Business Category
Services
Disclosed / Notified
May 12, 2025
Attack Summary
CARSTAR Business Group
CARSTAR Business Group is a company that operates in the Automotive Service & Collision Repair industry. It employs 50to99 people and has 5Mto10M of revenue. The company is headquartered in Ancaster, Ontario, Canada.Geo: Canada - Leak size: 65 GB Archive - Contains: Files
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 carstar.com
— indexed by HaveIBeenRansom.
3
found in Infostealer logs
2,994+
found in Traditional breaches
6+
found in Ransomware leaks
VerificationsIO_BF.7z.011
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Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
contacts_6.csv
Database World ROC · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
contacts_108.csv
Database World ROC · 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.