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high severity April 14, 2025 · 3 min read Unverified claim — what this is

Commune de Jemeppe-sur-Sambre Listed by ransomhouse Ransomware Group

If you are a customer of Commune de Jemeppe-sur-Sambre, here’s what is being claimed, and what it would mean for you.

Jemeppe-sur-Sambre is a municipality in Wallonia, located in the province of Namur, Belgium. It comprises several districts, including Balâtre, Ham-sur-Sambre, Jemeppe-sur-Sambre, Mornimont, Moustier-sur-Sambre, Onoz, Saint-Martin, and Spy. The municipality is notable for the Spy Cave, one of Europe's significant Paleolithic sites, and historical landmarks like Balâtre Castle and Mielmont Castle.

— from Ransomhouse’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
Commune de Jemeppe-sur-Sambre Listed by ransomhouse Ransomware Group

On April 14, 2025, the Belgian municipality of Jemeppe-sur-Sambre appeared on the leak site of the ransomware group known as RansomHouse. Internal files were allegedly exfiltrated during a ransomware attack on the local government body responsible for services used by thousands of residents in the Namur province of Wallonia.

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What's Publicly Reported from Reporting

Public reporting indicates that RansomHouse listed the municipality after it refused or failed to meet the group's demands. The exposed material consists of internal files taken from the town's networks. No precise count of affected residents has been released, but the breach touches a municipality that includes the districts of Balâtre, Ham-sur-Sambre, Jemeppe-sur-Sambre, Mornimont, Moustier-sur-Sambre, Onoz, Saint-Martin, and Spy. Available reporting describes the incident as a classic ransomware operation: initial access, data exfiltration, followed by public shaming on a dark-web leak site when payment is not made.

Why This Matters for You and Your Family

When a local government is hit, the records it holds often contain addresses, tax details, family information, and correspondence that belong to ordinary people like you. Even if your name is not splashed across the leak site today, once internal files leave official control they can surface in unexpected places months or years later. Children’s school records, household addresses, and parent contact details are exactly the kind of information that fuels identity theft, phishing, and physical risks. Belgian municipalities process data for births, marriages, residency permits, and social services; any of those records can be repurposed by criminals to build convincing profiles of you and your family.

The Doxxing and Identity-Chain Risks

Stolen municipal files rarely stay isolated. A single leaked email or phone number can be cross-referenced with gaming usernames, social-media handles, and data from earlier breaches. This creates an identity chain that links your real name and home address to online accounts you thought were private. Credential leaks of this nature frequently cascade into account takeovers, especially for gaming platforms popular with children and teenagers. Once attackers control a child’s gaming account tied to a family address, they can harvest additional personal details and escalate to full doxxing. The longer these connections remain unmapped, the harder it becomes to stop the spread.

RansomHouse Track Record

Public reporting attributes RansomHouse with emerging in 2021. The group has targeted hospitals, schools, local governments, and private companies across multiple countries. Its typical playbook involves gaining initial access through phishing or exploited vulnerabilities, exfiltrating sensitive files before encrypting systems, then pressuring victims with threats of public release. RansomHouse often sets short deadlines and follows through by publishing samples or full datasets on its leak site when demands are ignored. The group’s focus on public-sector organizations means many ordinary families have already been placed at risk by similar incidents.

What to do

  • Run a DoxxScan to map every link between your emails, phone numbers, handles, and real-world identity so you can see exactly what this claimed breach connects to.
  • Rotate any password you used for municipal portals or related Belgian government services and enable 2FA through an authenticator app rather than SMS.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next leak exposing you or your family is caught in hours, not months.
  • Cover the household with DoxxScan family coverage that extends to dependents and children’s gaming accounts that often chain back to the same address or parent email.
  • Let remediation specialists handle takedown requests across data brokers and suspicious sites while you focus on securing your own accounts.

The incident shows that even small municipalities can become gateways to personal exposure for everyone they serve. Taking concrete steps now limits how far this claimed breach can reach. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children’s gaming accounts. Start your DoxxScan trial today to regain control before the next link in the chain appears.

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Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

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value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 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.

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Commune de Jemeppe-sur-Sambre is one listing. Your email is probably in others.
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Report details & sourcing

Severity High the filing does not enumerate what was exposed
Disclosed April 14, 2025
Last reviewed August 8, 2026
Affected Unconfirmed
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.
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