high severity August 18, 2025 · 3 min read Unverified claim — what this is

Seoul Guarantee Insurance Listed by Gunra Ransomware Group

If you are a client of Seoul Guarantee Insurance, here’s what is being claimed, and what it would mean for you.

Seoul Guarantee Insurance was listed on Gunra's leak site. Gunra claims to have stolen internal data. This is the group's claim, not a confirmed finding.

Seoul Guarantee Insurance Listed by Gunra Ransomware Group

On August 18, 2025, South Korean insurer Seoul Guarantee Insurance appeared on the leak site of the gunra ransomware group. The listing indicates that internal files were exfiltrated during a ransomware attack on the company, which provides credit guarantees, surety bonds, trade insurance, and related financial services to businesses across South Korea.

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What Public Reporting Shows

Public reporting indicates that gunra posted SGI to its dark-web leak site on August 18, 2025. The group claims to have stolen internal company files, though the exact volume and specific data types remain unconfirmed in available reporting. No precise count of affected individuals has been released. The incident follows the typical ransomware pattern of initial access, data exfiltration, and subsequent extortion pressure.

Seoul Guarantee Insurance, founded in 1969 and headquartered in Seoul, handles sensitive business and personal financial records as part of its core operations in credit insurance, construction guarantees, and export insurance.

Why This Matters for You and Your Family

When insurers are breached, the data involved often includes names, addresses, financial details, policy information, and contact records that can be traced back to individuals and households. Even if you never directly purchased a policy from SGI, your information may appear in partner files, vendor records, or claims data shared during normal business operations.

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What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to Gunra · 54 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed August 18, 2025

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Threat-actor tracker

Gunra — 54 incidents tracked

Every breach we've attributed to Gunra, in one running log. See who else they've hit →

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