Was ch-armentieres.fr hit by ransomware?

ch-armentieres.fr was listed by the Blackout ransomware operation (France), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Blackout ransomware group?

Blackout is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the ch-armentieres.fr breach?

Blackout published data attributed to ch-armentieres.fr. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Centre Hospitalier d'Armentieres

listed as ch-armentieres.fr · Claimed by Blackout · listed 2 years ago

28m

Age

since listed · data leaked

Status timeline

ListedFeb 26, 2024
Data leakeddate unknown

At a glance

Group: Blackout
Status: Data leaked
Country: France
Sector: Healthcare
Listed on leak site: Feb 26, 2024

About the victim

AI dossier — public-source company profile

Centre Hospitalier d'Armentieres is a public hospital located in Armentieres, France. The institution provides general medical and surgical services to the local population.

Industry: Healthcare / Hospital

Attack summary

Severity: high — Confirmed encryption of critical healthcare infrastructure (100+ systems) with data published. Healthcare sector handles sensitive PII and medical data; operational disruption to a hospital poses direct risk to patient care.

Blackout claims to have encrypted over 100 servers and workstations at the facility. The group has published data from the attack on their blog but no specific details on exfiltrated data types are provided in the available excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post

Hospital IT infrastructure
Patient records (presumed)
Administrative systems

What the group claims

First post on our new blog ! We encrypted 100+ servers and workstations ...

Sources

Source

Indexed 2 years 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 Blackout

Blackout is a recently emerged ransomware group that began operations in February 2024, with their primary motivation appearing to be financial gain through extortion activities. The group has demonstrated relatively limited scope with nine documented victims to date, but has shown geographic diversity in their targeting across Greece, France, Germany, Canada, and Croatia. Their sector preferences indicate a focus on business services, healthcare, manufacturing, and transportation/logistics industries, suggesting they may target organizations with critical operational dependencies that increase pressure for ransom payment. Due to the group's recent emergence and limited public documentation from major security firms and government agencies, details regarding their specific attack methodologies, initial access vectors, encryption techniques, and operational structure remain largely undocumented in open-source intelligence reporting. No major high-profile campaigns or significant law enforcement actions have been publicly reported in connection with this group's activities. Given the February 2024 first observation date and the relatively small victim count, Blackout appears to be a newly active but minor player in the ransomware landscape, though their current operational status and potential growth trajectory remain subjects for continued monitoring by threat intelligence analysts. The group has been linked to 9 public disclosures across our corpus. First observed on a leak site on February 26, 2024; most recent post December 10, 2024. The operation is currently inactive.

Timeline of this disclosure

February 26, 2024ch-armentieres.fr listed by Blackouton the group's public leak site

Other recent disclosures by Blackout

Blackout has been linked to 9 public victims on Darkfield. A sample of the most recent:

See the full Blackout dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, ch-armentieres.fr is reported in France, a country with 612 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blackout means ch-armentieres.fr 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.
Report the incident to your national CERT, CERT-FR (France), as required for your jurisdiction.
Monitor for the data appearing on Blackout'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.