This record tracks a ransomware attack claimed by the
qilin group against
Grupo Tomza. 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.
-79days
t1 · Published
t2 · Disclosed
Published
February 21, 2026
Disclosed / Notified
Dec 05, 2025
Attack Summary
The organization Grupo Tomza appears on the qilin ransomware leak site. It operates in the Other sector. The affected entity is based in Mexico. The incident was first observed on February 21, 2026. Breach House tracks this attack from public ransomware leak-site postings for threat-intelligence purposes.
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 grupotomza.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
237+
found in Traditional breaches
29+
found in Ransomware leaks
Atlantic International University
medusa · ransomware
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
JobAndTalent_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Dropbox_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
AntiPublic_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Deezer_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
LinkedIn.com.txt
Database World ROC · breach
••• emails
+ 17 more leak sources 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.