This record tracks a ransomware attack claimed by the
dragonforce group against
RÉSO. 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.
0days open
t1 · Published
t2 · Pending
Indexed by Breach House
October 07, 2026
Leak Status
leaked
checked 2026-10-07
Disclosed / Notified
Not disclosed yet
Attack Summary
Réso specializes in secondary works, offering a wide range of products including ceilings, partitions, floors, technical floors, and facades. They provide modular and dry partitions, acoustic products, and various accessories, ensuring a comprehensive solution for construction needs. With numerous agencies across France and a team of specialists trained in the latest innovations, Réso serves a diverse clientele with thousands of available products. Their commitment to quality and service is reflected in their partnerships and significant projects.
676 GB of confidential information about their customers, partners, employees were stolen. The entire network was locked including nearly 8TB of Veeam backups.
The company has failed to reach for an agreement.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-10-07. Verdict evidence: [H6] Publicated files: click here to go
Showing the latest capture only
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Dark Web Exposure
Findings for reso.fr
— indexed by HaveIBeenRansom.
513
found in Infostealer logs
434+
found in Traditional breaches
40+
found in Ransomware leaks
Full Clouds Cit0day_2.7z.001
DBs w MTDT · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Mingat Location
akira · ransomware
••• emails
Dump_public_deezer.com_09.2019_nopassw.7z.001
DBs Backup · breach
••• emails
LKnet reserve chat · breach
••• emails
Database World ROC · breach
••• emails
+ 17 more leak sources locked
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