This record tracks a ransomware attack claimed by the
alphv group against
Constellation Software Inc. 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.
1138days open
t1 · Published
t2 · Pending
Disclosed / Notified
Not disclosed yet
Attack Summary
Headquartered Toronto, Ontario, Constellation Software, Inc. is a holding company. The firm acquires, manages and builds vertical market software businesses
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 csisoftware.com
— indexed by HaveIBeenRansom.
12
found in Infostealer logs
570+
found in Traditional breaches
673+
found in Ransomware leaks
Televerde
play · ransomware
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
Access Intelligence
play · ransomware
••• emails
contacts_82.csv
Database World ROC · breach
••• emails
contacts_20.csv
Database World ROC · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 20 sources.
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.