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Ransom & Dark Web Issues Week 1, Novermber 2025

Asec.Ahnlab •ATCP • November 5, 2025

ASEC Blog publishes Ransom & Dark Web Issues Week 1, Novermber 2025 Black Shrantac Targets South Korean Cybersecurity and Network Solutions Company Japanese Major Online Retailer Listed as New Victim by Ransomware Group RansomHouse Data from Japanese ISP Leaked on DarkForums

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

RansomHouse Targets South Korean and Japanese Companies in Cyber Attacks In October and November 2025, the ransomware group RansomHouse targeted multiple companies, including a South Korean food manufacturing firm and a Japanese online retailer. Data breaches were reported, with leaked information appearing on dark web forums, indicating a significant escalation in ransomware activities affecting these sectors. 2 sources 23

Extracted Entities

Ransom & Dark Web Issues Week 1, Novermber 2025

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Extracted Entities

Attack Types (2)

Countries (2)

Ransomware Groups (1)