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Ransomware Victim Financial Services

Seoul Guarantee Insurance

Ransomware attack by Gunra · Disclosed August 18, 2025 · 🇰🇷 South Korea

sgic.co.kr

Date Disclosed
Aug 18, 2025
2025
Threat Group
Gunra
49 total victims
Country
🇰🇷 South Korea
Industry
Financial Services

Incident Analysis

Seoul Guarantee Insurance was targeted by Gunra ransomware, one of the most active ransomware groups in our database with 49 confirmed victims globally. The attack was disclosed on August 18, 2025, when Seoul Guarantee Insurance appeared on the group's dark web leak site.

Seoul Guarantee Insurance is based in South Korea , operating in the Financial Services sector. South Korea ranks #29 globally for ransomware attacks, with 104 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.

Gunra 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: Aug 4, 2026 12:00 UTC.

Frequently Asked Questions

Was Seoul Guarantee Insurance attacked by ransomware?

Yes. Seoul Guarantee Insurance was listed as a victim of the Gunra ransomware group on August 18, 2025. The organisation is based in South Korea and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Seoul Guarantee Insurance?

Seoul Guarantee Insurance was attacked by Gunra ransomware. Gunra is one of the most active ransomware groups, having claimed 49 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Seoul Guarantee Insurance ransomware attack occur?

The ransomware attack on Seoul Guarantee Insurance was disclosed on August 18, 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 Seoul Guarantee Insurance ransomware attack?

The specific data stolen from Seoul Guarantee Insurance 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, Seoul Guarantee Insurance likely held financial records, client data, and transaction histories.

How can organisations protect against Gunra attacks?

To defend against Gunra 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.