Was Compagnie des Guides de Chamonix hit by ransomware?

Compagnie des Guides de Chamonix was listed by the radar ransomware operation (France), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the radar ransomware group?

radar is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Compagnie des Guides de Chamonix breach?

radar published data attributed to Compagnie des Guides de Chamonix. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Compagnie des Guides de Chamonix

Claimed by Radar · listed 10 months ago

10m

Age

since listed · data leaked

Status timeline

ListedSep 11, 2025
Data leakeddate unknown

At a glance

Group: Radar
Status: Data leaked
Country: France
Sector: Hospitality and Tourism
Listed on leak site: Sep 11, 2025

About the victim

AI dossier — public-source company profile

Compagnie des Guides de Chamonix is one of the oldest and most renowned mountain guiding organizations in the world, founded in 1821 in Chamonix-Mont-Blanc, France. It provides professional alpine guiding services including mountaineering, skiing, and hiking in the Mont Blanc massif and beyond. The organization represents a cooperative of certified mountain guides operating in the French Alps.

Industry: Mountain Guiding & Outdoor Tourism
Address: Maison de la Montagne, 190 Place de l'Église, 74400 Chamonix-Mont-Blanc, France
Employees: 11-50
Founded: 1821

Attack summary

Severity: medium — Data has been published (disclosed status confirmed), indicating exfiltration occurred, but the specific data types, volume, and sensitivity are unknown. No regulated or large-scale PII confirmed from available evidence.

The Radar ransomware group has listed Compagnie des Guides de Chamonix as a victim with a disclosed status of data_published, indicating data exfiltration and/or publication. The specific nature and volume of exfiltrated data are not detailed in the truncated leak post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Internal business documents
Client/customer records
Employee data
Financial records

What the group claims

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

The leak post

captured from the group's site

TUAN LE Construction Company Limited
Chek Tan and Company, LLP
Fouad Alghanim & Sons Group of Companies Holding W.L.L.
R F Owens Co, Inc./ Trucchi's Supermarkets Distribution Center
Compagnie des Guides de Chamonix
Namibia | Epia Financial Services | Windhoek
Menten Truck Service N.V., Hoeselt, Belgium
ROBERT G. DASHIELL, JR., P.E., INC

Screenshot of the leak post

Leak screenshot for Compagnie des Guides de Chamonix

Sources

Victim sitechamonix-guides.com
Leak posthttp://3bnusfu2lgk5at43ceu7cdok5yv4gfbono2jv57ho74ucjvc7czirfid.onion/leaked-data/?id=63

Source

Indexed 10 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About radar

Radar is an emerging ransomware group that first appeared in September 2025, operating with apparent financial motivations based on their targeting patterns across multiple sectors and countries. The group's origin and affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their geographic targeting suggests a focus on English-speaking nations and select international markets. Based on available victim data, Radar appears to employ opportunistic targeting methods that have successfully compromised 23 organizations across diverse sectors including construction, financial services, transportation/logistics, and technology, with operations spanning the United States, United Kingdom, Australia, Kuwait, and other regions. The group's attack methodology, encryption techniques, and whether they employ double or triple extortion tactics have not been extensively documented by major threat intelligence firms or law enforcement agencies. No significant high-profile campaigns, major ransoms, or law enforcement disruption actions against Radar have been publicly reported by CISA, FBI, or established security research organizations. Given the group's recent emergence and limited public intelligence reporting, Radar's current operational status and long-term capabilities remain under assessment by the cybersecurity community. The group has been linked to 26 public disclosures across our corpus. First observed on a leak site on September 10, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

September 11, 2025Compagnie des Guides de Chamonix listed by radaron the group's public leak site

Other recent disclosures by radar

radar has been linked to 26 public victims on Darkfield. A sample of the most recent:

See the full radar dossier →

Sector and geography

This disclosure adds to ransomware activity in the Hospitality and Tourism sector, which has 452 disclosures indexed across all operators we track. Geographically, Compagnie des Guides de Chamonix is reported in France, a country with 612 ransomware disclosures in our corpus.

If your organisation is affected

A listing by radar means Compagnie des Guides de Chamonix appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CERT-FR (France), as required for your jurisdiction.
Monitor for the data appearing on radar's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.