This record tracks a ransomware attack claimed by the
radar group against
Compagnie des Guides de Chamonix. 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.
-37days
t1 · Published
t2 · Disclosed
Published
August 15, 2025
Disclosed / Notified
Jul 09, 2025
Attack Summary
Chamonix Office +33 (0)4 50 53 00 88, Maison de la montagne, 190 place de l'église, 74400 Chamonix
Argentière Office +33 (0)4 50 54 17 94 , 24 Route du village, 74400 Argentière
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 chamonix-guides.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
35+
found in Traditional breaches
0+
found in Ransomware leaks
Database World ROC · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
RapidFlyer_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
123RF_BF.7z
TheUnderground - Reborn · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Drupal.zip
Database World ROC · breach
••• emails
+ 5 more leak sources locked
Leak volumes are 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.