This record tracks a ransomware attack claimed by the
ransomed group against
NTT Docomo - Japan 1st Mobile Operator. 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.
-45days
t1 · Published
t2 · Disclosed
Business Category
Telecommunications
Published
September 26, 2023
Disclosed / Notified
Aug 13, 2023
Attack Summary
With approximately 310,000 employees worldwide, NTT (Nippon Telegraph and Telephone Corporation) is one of the world's leading telecommunications carriers. It is chosen by as many as 88% of the top 100 companies in the Fortune Global Business Ranking "Fortune 500", an annual U.S. business magazine. We offer a wide range of services in Japan, from fixed-line and mobile phones to the Internet and system integration.We have got into their base and exfiltrated everything from there, we dont get paid.We require a ransom of $1,015,000
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 nttdocomo.co.jp
— indexed by HaveIBeenRansom.
62
found in Infostealer logs
1,483+
found in Traditional breaches
79+
found in Ransomware leaks
limeleads_breach.7z
TheUnderground - Reborn · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
2844Breaches_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
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
LinkedIn.com.txt
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
Sign in to reveal how many records each source exposed and the remaining 20 sources.
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.