This record tracks a ransomware attack claimed by the
thegentlemen group against
Groupe AC Environnement. 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 · Discovered
t2 · Pending
Business Category
Services
Indexed by Breach House
October 29, 2026
Leak Status
pending
checked 2026-10-29
Disclosed / Notified
Not disclosed yet
Attack Summary
Groupe AC Environnement operates within the Services sector, providing environmental and associated service offerings. As a victim of ransomware activity, this entity is documented in the threat-intelligence index under the ransomware victim listing type. The association with thegentlemen threat actor is noted for analytical context within cybersecurity reporting frameworks. This entry serves to catalog verified threat-related incidents without disclosing unconfirmed operational details or speculative claims about the attack. The record maintains neutrality while aligning with standard threat-intelligence documentation practices for identified ransomware victims.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-10-29. Verdict evidence: [M1] Activates in 179:07:17
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Dark Web Exposure
Findings for ac-environnement.com
— indexed by HaveIBeenRansom.
403
found in Infostealer logs
475+
found in Traditional breaches
4+
found in Ransomware leaks
linkedIN_2.7z.001
Database World ROC · breach
••• emails
BqNyADhG.7z
DBs Backup · breach
••• emails
linkedIN_2.7z.001
DBs Backup · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
colisprive.fr.rar
Database World ROC · breach
••• emails
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