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 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.
1day open
t1 · Published
t2 · Pending
Business Category
Telecommunications
Indexed by Breach House
September 18, 2026
Leak Status
pending
checked 2026-09-19
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
2 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-09-19. Verdict evidence: [M1] Data will be public on: September 24, 2026
Proof files published by the operator —
1 image(s) harvested from this entry.
Content is locked; type and dimensions shown.
Capture history —
2 day(s) tracked. Content is locked.
Showing the latest capture only
Unlock the 2 captures already taken, plus the 1 proof file(s) the operator published.
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
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••• emails
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••• 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
+ 17 more leak sources locked
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