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Katholieke Kerk Amersfoort

listed as katholiekamersfoort.nl UPDATE-FOR SALE · Claimed by Stormous · listed 4 days ago

4d
Age
since listed · data leaked

Status timeline

  1. ListedJun 9, 2026
  2. Data leakeddate unknown

At a glance

Group
Stormous
Status
Data leaked
Country
Netherlands
Listed on leak site
Jun 9, 2026

About the victim

AI dossier — public-source company profile

Katholieke Kerk Amersfoort is a Catholic church organization based in Amersfoort, Netherlands, operating the website katholiekamersfoort.nl. The organization serves a congregation and maintains donor, staff, and member records.

Industry
Religious Organization / Church

Attack summary

Severity: critical — Confirmed exfiltration of large-scale PII (10+ GB) affecting donors, staff, and congregation members. Religious organizations maintain sensitive personal and financial information. Data has been published.

Stormous claims to have breached the church's network and exfiltrated over 10 GB of data including donor information, staff PII, contact lists, board/committee records, and system metadata. The group has published this data.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Donor personal information
  • Staff PII
  • Contact lists
  • Board and committee data
  • Internal network shares and documents
  • System metadata
  • Database records

What the group claims

The church website's network (katholiekamersfoort.nl/) has been breached, resulting in the exfiltration of over 10 GB of data. This data pertains to donors, staff, and the personal information of a large number of individuals. The compromised data includes: Databases and Personally Identifiable Information (PII), internal network shares and document, contact lists, board and committee data, as well as system metadata.

Source

Indexed 4 days ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Stormous

Stormous is a relatively new ransomware group that emerged in March 2022, operating primarily with financial motivations and has claimed responsibility for attacks against at least 165 victims across multiple countries and sectors. The group's country of origin remains unclear from publicly documented sources, though their operational patterns suggest they may operate as an independent entity rather than a established ransomware-as-a-service model. Limited public documentation from major security firms indicates the group employs common ransomware tactics, though specific details about their initial access vectors, encryption methods, and data exfiltration practices have not been extensively detailed in reports from CISA, FBI, or major threat intelligence providers. Their targeting appears geographically diverse with a focus on Spain, the United States, France, UAE, and Brazil, while showing particular interest in technology, hospitality and tourism, government, and business services sectors, though many of their victims span unspecified industries. As of current reporting, Stormous appears to remain an active threat, though the limited public documentation suggests they operate as a lower-tier ransomware group compared to more prominent families that receive extensive coverage from major security research organizations. The group has been linked to 226 public disclosures across our corpus. First observed on a leak site on March 22, 2022; most recent post June 12, 2026. The operation is currently active.

Timeline of this disclosure

  • June 9, 2026katholiekamersfoort.nl UPDATE-FOR SALE listed by Stormouson the group's public leak site

Other recent disclosures by Stormous

Stormous has been linked to 226 public victims on Darkfield. A sample of the most recent:

See the full Stormous dossier →

Sector and geography

Geographically, katholiekamersfoort.nl UPDATE-FOR SALE is reported in Netherlands, a country with 24 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Stormous means katholiekamersfoort.nl UPDATE-FOR SALE appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Monitor for the data appearing on Stormous's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

katholiekamersfoort.nl UPDATE-FOR SALE data breach — Stormous ransomware leak (2026) · Darkfield