ransomware
JapanSecurity Affairs
JapanSecurity AffairsAskul data breach exposed over 700,000 records after ransomware attack
Wednesday, December 17, 2025
What
A ransomware attack led to the compromise of sensitive data and significant operational disruptions at Askul.
Where
Japan, specifically affecting Askul Corporation, part of the LOHACO/Yahoo Japan ecosystem.
When
The attack was detected on October 19, 2025, with data leakage occurring in November and December.
Key Factors
- •Attackers accessed the network using stolen credentials and disabled security systems.
- •The ransomware group claimed to have stolen 1 TB of data and leaked it following failed negotiations.
- •The breach affected approximately 590,000 business records, 132,000 consumer records, and 2,700 employee records.
Takeaways
- →Organizations should enhance credential management and monitoring to prevent unauthorized access.
- →The incident highlights the growing threat of ransomware attacks on e-commerce and logistics sectors.
- →Companies must develop and regularly update their Business Continuity Plans (BCP) to mitigate the impact of such attacks.
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