Japanese E-commerce Giant Askul Hit by Ransomware Attack, 700,000 Records Stolen

Askul hit by ransomware, exposing 700K records and halting operations. Attack by RansomHouse highlights rising cyber threats in Japan.

By Content Team

Dec 16, 2025

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Japanese B2B office supplies company Askul suffered a devastating ransomware attack in October, compromising over 700,000 customer and business partner records. The RansomHouse group detected the breach on October 19, encrypting files and stealing more than 1TB of sensitive data before the company could respond.

The attack crippled Askul's highly automated logistics systems, disrupting orders and shipping for weeks. Services didn't resume until early December. The hackers accessed the network using stolen credentials, then moved laterally through systems while disabling security measures and deleting backups.

RansomHouse leaked stolen data in November and December after Askul refused to pay ransom demands. The breach joins a troubling pattern of cyberattacks targeting major Japanese companies including Asahi, Nikkei, and Nippon Steel subsidiaries.

Source: Security Week

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