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Sigma

thegentlemen

This record tracks a ransomware attack claimed by the thegentlemen group against Sigma. 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.

418days open
t1 · Published t2 · Pending
Jul 14, 2025Not disclosed yet
Country
France
Business Category
IT
Employees
51-100
Discovered
2025-09-09
Published
July 14, 2025
Disclosed / Notified
Not disclosed yet
Victim ID
FL8XfQqupKdK

Attack Summary

Sigma Informatique, also known as Groupe Sigma, is a mission-driven IT and digital services company headquartered in La Chapelle-sur-Erdre, France, with over 50 years of experience in the sector. The firm specializes in software publishing, integration of tailor-made digital solutions, and outsourced technology services, supporting clients through their digital transition with 700 employees across five agencies. As a 100% French enterprise, Sigma provides comprehensive IT support and innovation services to businesses seeking impactful digital transformation. The company was listed as a ransomware victim associated with the threat actor thegentlemen.

Leak Screenshots

SAMPLE

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finance_2024.xlsx
passport_scan.jpg
contract_signed.pdf
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Dark Web Exposure

Findings for sigma.fr — indexed by HaveIBeenRansom.
1,168
found in Infostealer logs
1,339+
found in Traditional breaches
31+
found in Ransomware leaks
pureincubation-com.7z.001
Database World ROC · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum 🪾 · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
Database World ROC · breach
••• emails
play · ransomware
••• emails
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