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BHN Expertise

listed as bhn-expertise.com · Claimed by Threeam · listed 1 day ago

1d
Age
since listed · data leaked

Status timeline

  1. ListedSep 28, 2026
  2. Data leakeddate unknown

At a glance

Group
Threeam
Status
Data leaked
Country
Germany
Sector
Professional Services
Listed on leak site
Sep 28, 2026

About the victim

AI dossier — public-source company profile

BHN Expertise is a French accounting firm operating across Normandy and the Paris region with offices in Bolbec, Caen, Rouen, and Yvetot. The firm provides comprehensive accounting, audit, tax, legal, HR, and strategic consulting services to approximately 3,000 clients, with an annual turnover of €12 million and a team of multidisciplinary experts.

Industry
Accounting & Professional Services
Address
Offices in Bolbec, Caen, Rouen, and Yvetot, Normandy, France; additional presence in Paris region
Employees
51-200

Attack summary

Severity: high — Accounting firm with access to sensitive financial, tax, and payroll records for 3,000+ clients. Exfiltration of such regulated business data affecting multiple third parties constitutes significant exposure, though specific proof inventory and data scope are not detailed in the excerpt.

The threeam group claims to have compromised BHN Expertise and exfiltrated data. No specific details on data categories or operational disruption are stated in the leak post excerpt provided.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • client accounting records
  • financial documentation
  • payroll data
  • audit reports
  • tax filings
  • business client information

What the group claims

BHN Expertise is an accounting firm that helps businesses manage their financial records and grow smartly. With offices across Normandy in cities like Bolbec, Caen, Rouen, and Yvetot, they provide local support and personalized accounting services

Sources

Source

Indexed 1 day 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 Threeam

Threeam is a financially motivated ransomware group that emerged in September 2023, operating as a relatively new player in the ransomware ecosystem with 64 documented victims across multiple countries and sectors. The group's origin and potential affiliations remain unclear due to limited public documentation from major security agencies, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing. Based on available victim data, Threeam appears to employ common initial access vectors targeting organizations across business services, healthcare, manufacturing, and technology sectors, with the United States, United Kingdom, Australia, France, and Brazil representing their primary geographic focus areas. While specific technical details about their encryption methods and extortion tactics have not been extensively documented by major threat intelligence firms, their emergence in late 2023 and victim count suggests they have established operational capabilities within the competitive ransomware landscape. The group's current operational status remains active based on the recency of their emergence, though detailed law enforcement actions or disruption efforts have not been publicly reported by CISA, FBI, or other major security organizations. The group has been linked to 99 public disclosures across our corpus. First observed on a leak site on September 14, 2023; most recent post September 28, 2026. The operation is currently inactive.

Timeline of this disclosure

  • September 28, 2026bhn-expertise.com listed by Threeam on the group's public leak site

Other recent disclosures by Threeam

Threeam has been linked to 99 public victims on Darkfield. A sample of the most recent:

See the full Threeam dossier →

Sector and geography

This disclosure adds to ransomware activity in the Professional Services sector, which has 17 disclosures indexed across all operators we track. Geographically, bhn-expertise.com is reported in Germany, a country with 393 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Threeam means bhn-expertise.com 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-Bund (Germany), as required for your jurisdiction.
  • Monitor for the data appearing on Threeam'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.