Disclosure context

About ransomed

The ransomed ransomware group is a relatively new cybercriminal organization that emerged in August 2023, primarily motivated by financial gain through extortion activities targeting organizations across multiple countries. Based on their targeting patterns across Japan, Brazil, Russia, Great Britain, and Bulgaria, the group appears to operate internationally without clear geographic limitations, though their country of origin and potential affiliations with other ransomware groups remain undetermined due to limited public intelligence reporting. Given the recent emergence of this group and lack of detailed technical analysis from major security firms, their specific attack methodologies, initial access vectors, and encryption techniques have not been comprehensively documented in publicly available threat intelligence reports from CISA, FBI, or established security researchers. The group has claimed approximately 68 victims across their identified target countries since becoming active, though no specific high-profile campaigns or notable ransom demands have been publicly reported by law enforcement or security organizations. As of current reporting, the group appears to remain active with continued victim claims, though the limited public documentation suggests they operate as a lower-profile ransomware operation compared to more established and widely-tracked ransomware families. The group has been linked to 68 public disclosures across our corpus. First observed on a leak site on August 21, 2023; most recent post October 30, 2023. The operation is currently inactive.

Timeline of this disclosure

October 6, 2023NTT Docomo listed by ransomedon the group's public leak site

Records: 310.000 employees

Sector and geography

This disclosure adds to ransomware activity in the Telecommunications sector, which has 17 disclosures indexed across all operators we track. Geographically, NTT Docomo is reported in Japan, a country with 108 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

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NTT Docomo

Claimed by ransomed · listed 3 years ago

310.000 employees

Records

31m

Age

since listed · data leaked

Status timeline

Listed
Oct 6, 2023
Data leaked

At a glance

Group: ransomed
Status: Data leaked
Country: Japan
Sector: Telecommunications
Listed on leak site: Oct 6, 2023
Records: 310.000 employees

About the victim

AI dossier — public-source company profile

NTT Docomo is a major telecommunications carrier operating under NTT (Nippon Telegraph and Telephone Corporation), one of the world's largest telecom groups with approximately 310,000 employees worldwide. NTT serves 88% of the Fortune 500's top 100 companies and offers a wide range of telecommunications and related services primarily in Japan. NTT Docomo is NTT's mobile communications subsidiary, providing mobile phone and data services across Japan.

Industry: Telecommunications
Employees: 310000

Attack summary

Severity: high — NTT Docomo is a major global telecommunications carrier with hundreds of thousands of employees and millions of customers; a confirmed data_published status against such a high-profile critical infrastructure operator implies significant business and potentially customer data exposure, warranting a high severity rating even without explicit enumeration of data types.

The group 'ransomed' claims to have published data related to NTT Docomo; the post references the broader NTT corporation and indicates data has been disclosed, though specific details on encryption or exfiltration method and the precise nature of the data at stake are not stated in the truncated post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate data
Potentially customer or employee records

What the group claims

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…

Sources

Leak posthttp://f6amq3izzsgtna4vw24rpyhy3ofwazlgex2zqdssavevvkklmtudxjad.onion/?p=61

Source

Indexed 3 years ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.