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Ransomware Victim Financial Services

tokiomarine-nichido.co.jp

Ransomware attack by Kawa4096 · Disclosed July 1, 2025 · 🇯🇵 Japan

tokiomarine-nichido.co.jp

Date Disclosed
Jul 1, 2025
2025
Threat Group
Kawa4096
17 total victims
Country
🇯🇵 Japan
Industry
Financial Services

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Kawa4096. Figures and technique mappings are quoted from the source data, not inferred.

About the Kawa4096 group

Kawa4096 is a ransomware group that emerged in June 2025, targeting multinational corporations across finance, education, and services sectors primarily in the US and Japan, using partial-encryption (25% of each file chunk) with Salsa20 and a leak site styled after Akira's retro terminal aesthetic, claiming at least 11 victims. Kawa4096 has listed 17 victims since June 2025.

Incident Analysis

tokiomarine-nichido.co.jp was targeted by Kawa4096 ransomware, one of the most active ransomware groups in our database with 17 confirmed victims globally. The attack was disclosed on July 1, 2025, when tokiomarine-nichido.co.jp appeared on the group's dark web leak site.

tokiomarine-nichido.co.jp is based in Japan , operating in the Financial Services sector. Japan ranks #11 globally for ransomware attacks, with 268 victims in our database.

Sector context: Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Kawa4096 typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 11, 2026 14:00 UTC.

Frequently Asked Questions

Was tokiomarine-nichido.co.jp attacked by ransomware?

Yes. tokiomarine-nichido.co.jp was listed as a victim of the Kawa4096 ransomware group on July 1, 2025. The organisation is based in Japan and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked tokiomarine-nichido.co.jp?

tokiomarine-nichido.co.jp was attacked by Kawa4096 ransomware. Kawa4096 is one of the most active ransomware groups, having claimed 17 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the tokiomarine-nichido.co.jp ransomware attack occur?

The ransomware attack on tokiomarine-nichido.co.jp was disclosed on July 1, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the tokiomarine-nichido.co.jp ransomware attack?

The specific data stolen from tokiomarine-nichido.co.jp has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Financial Services organisation, tokiomarine-nichido.co.jp likely held financial records, client data, and transaction histories.

How can organisations protect against Kawa4096 attacks?

To defend against Kawa4096 and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.