This record tracks a ransomware attack claimed by the
EndZone group against
AT&T. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Dark Eye.
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
Business Category
Telecommunications
Published
September 18, 2026
Disclosed / Notified
Not disclosed yet
Attack Summary
att.com operates within the United States telecommunications sector, providing services aligned with network infrastructure and communications solutions. As cataloged in the threat-intelligence index, it is classified as a ransomware victim entity associated with the threat actor EndZone. This listing reflects observed cybersecurity intelligence linkages without confirming specific incident details, breach contents, or operational impacts. The entry serves to document the relationship between the entity, its sector context, and the identified threat actor for risk assessment and monitoring purposes.
Leak Screenshots
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Dark Web Exposure
Findings for att.com
— indexed by HaveIBeenRansom.
119,866
found in Infostealer logs
2,194+
found in Traditional breaches
806+
found in Ransomware leaks
Televerde
play · ransomware
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
USA_Customers_04.2021_(153.986.518) @dbworldcloud.part01.rar
DBs Backup · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
Database World ROC · breach
••• emails
Database World ROC · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
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