Disclosure context

About Donutleaks

Donutleaks is a ransomware group that emerged in August 2022, operating with primarily financial motivations and demonstrating a pattern of targeting critical infrastructure and business sectors across multiple countries. The group's origin and specific affiliations remain largely undocumented in publicly available threat intelligence reports, with limited information available from major security firms or law enforcement agencies regarding their operational structure or potential ransomware-as-a-service model. Based on the limited public documentation available, the group has demonstrated a preference for attacking healthcare, technology, manufacturing, business services, and telecommunications sectors, with their attack methodology and specific technical capabilities not extensively detailed in current threat intelligence reporting. Donutleaks has been associated with approximately 42 documented victims primarily concentrated in the United States, Italy, Iran, and Spain, though specific high-profile campaigns or ransom demands have not been widely reported by major cybersecurity organizations or law enforcement agencies. The current operational status of Donutleaks remains unclear due to limited public threat intelligence coverage of this particular threat actor. The group has been linked to 42 public disclosures across our corpus. First observed on a leak site on August 24, 2022; most recent post July 24, 2024. The operation is currently inactive.

Timeline of this disclosure

July 9, 2023Nabtesco Motion Control listed by Donutleakson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Nabtesco Motion Control 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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Nabtesco Motion Control

Claimed by Donutleaks · listed 3 years ago

34m

Age

since listed · data leaked

Status timeline

Listed
Jul 9, 2023
Data leaked

At a glance

Group: Donutleaks
Status: Data leaked
Country: Japan
Sector: Manufacturing
Listed on leak site: Jul 9, 2023

About the victim

AI dossier — public-source company profile

Nabtesco Motion Control is a division of Nabtesco Corporation, described as the world's largest manufacturer of precision cycloidal gearboxes. The company produces high-performance reduction gears, hollow shaft gear heads, and single-axis servo-actuators and controllers. Its products are widely used in industrial robotics, automation, and precision machinery.

Industry: Precision Cycloidal Gear & Motion Control Manufacturing

Attack summary

Severity: high — Data has been confirmed published by the threat actor against a globally significant precision manufacturing company whose technology underpins industrial robotics and automation supply chains; exfiltration of proprietary engineering or business data from the world's largest cycloidal gearbox manufacturer carries significant industrial and commercial sensitivity.

Donutleaks claims to have compromised Nabtesco Motion Control and has published data (disclosed status: data_published), though the leak post does not specify whether encryption occurred or detail the volume of exfiltrated data.

high

Data the group says was taken

AI dossier — extracted from the leak post

Unspecified company data

What the group claims

High Precision Cycloidal Gear Manufacturer - NabtescoNabtesco manufactures cycloidal gearboxs and provides high performance reduction gears, hollow shaft gear heads and single axis servo-actuators and controllers.Nabtescohttps://www.nabtescomotioncontrol.com/ Nabtesco is the largest precision Cycloidal gearbox manufacturer in the world and leads the precision gear industry by providing High…

Sources

Victim sitenabtescomotioncontrol.com
Leak posthttp://sbc2zv2qnz5vubwtx3aobfpkeao6l4igjegm3xx7tk5suqhjkp5jxtqd.onion/nabtesco-motion-control/

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.