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Confidence MediumNov 3, 2025askul.co.jp

Askul Confirms Data Leak After Cyberattack

PatternExternal actor · Malware · Confidentiality impact

On November 3, 2025, Japanese retailer Askul confirmed that customer and supplier data was exposed after a ransomware attack earlier in October disrupted its e-commerce operations. The RansomHouse group took credit for the attack, claiming to have stolen 1.1 terabytes of data, including user contact details, inquiry records, and supplier information.

Signal date
Nov 3, 2025
Updated
Jun 25, 2026
Confidence
Medium
Sources
1 source
askul.co.jp logo

Askul

Sector
Retail Trade
Signals
1 linked

Signal context

First seen: Nov 3, 2025

Last updated: Jun 25, 2026

Status: Public signal

Key points

  • Ransomware attack by RansomHouse group
  • 1.1 terabytes of data stolen
  • Customer and supplier data exposed

Signal analysis

Beta

This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.

Affected organization
Askul logo
Askul

Sector: Retail Trade

Likely country: 🇯🇵 Japan

inferred from company domain

    Estimated
    Threat source
    Malware, Error activity

    The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.

    • Source type: outside the affected organization
    • Source type: supplier or third-party involvement
    Business impact
    Potential operational disruption

    Impact area: Confidentiality, Availability

    Likely asset: User or customer data

    Trend context
    29 signals with similar action pattern
    • 1 signal in the same sector
    • 100 signals with the same likely impact area
    • 1 signal linked to this organization/domain
    Mentioned entities
    AskulData DisclosureCyberattack On NovemberJapaneseAskulThe RansomHouseRansomwareRansomHouseCustomer and

    External sources

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