Was Adviesbureau De Beuckelaer BV hit by ransomware?

Adviesbureau De Beuckelaer BV was listed by the Braincipher ransomware operation (Netherlands), 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 Braincipher ransomware group?

Braincipher 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 Adviesbureau De Beuckelaer BV breach?

Braincipher published data attributed to Adviesbureau De Beuckelaer BV. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Adviesbureau De Beuckelaer BV

Claimed by BrainCipher · listed 4 days ago

Age

since listed · data leaked

Status timeline

ListedAug 31, 2026
Data leakeddate unknown

At a glance

Group: BrainCipher
Status: Data leaked
Country: Netherlands
Sector: Professional Services
Listed on leak site: Aug 31, 2026

About the victim

AI dossier — public-source company profile

Adviesbureau De Beuckelaer BV is a professional services firm based in the Netherlands. Limited public information is available about the company's specific operations or scale.

Industry: Management Consulting & Professional Services

Attack summary

Severity: critical — Confirmed exfiltration of regulated sensitive data at scale: GDPR-protected health information, financial records of 430+ clients, personal data, and identity documents (eID copies). Multi-category breach involving PII, financial, and health data creates significant regulatory and reputational risk.

BrainCipher claims to have exfiltrated approximately 415,000 documents totaling over 150 GB from the company. The group alleges the data includes financial records for over 430 clients, personal data, health information, identity documents, and internal infrastructure details.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Financial data (430+ clients)
Financial statements and turnover figures
Banking information
Personal data of individuals
Health data (GDPR-regulated)
Copies of eID cards
Internal infrastructure documentation

Original description

AI-summarised, not from the leak post

N/A

The leak post

captured from the group's site

We have about 415,000(415k) documents and files of your company, with a total size of over 150 GB. Virtually all data falls under the protected category: 1) Financial data for more than 430 clients, financial statements, turnover figures, and banking information; 2) Personal data of individuals; 3) Health data (GDPR); 4) Copies of eID cards; 5) And the company’s internal infrastructure. If you think you are here by mistake, please contact us at [email protected]
⏳ Deadline: September 12, 2026 at 13:00

Sources

Leak posthttp://vkvsgl7lhipjirmz6j5ubp3w3bwvxgcdbpi3fsbqngfynetqtw4w5hyd.onion/n/adviesbureau-de-beuckelaer-BV

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 Braincipher

Braincipher is a recently emerged ransomware group that was first observed in July 2024, operating with apparent financial motivations and targeting organizations primarily across North America and Europe. The group's origin and potential affiliations remain largely undocumented by major threat intelligence organizations, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing, likely operating as an independent entity rather than through established ransomware-as-a-service infrastructure. Their attack methodology and specific technical capabilities have not been extensively documented by CISA, FBI, or major security research firms, though their victim distribution across 44 confirmed targets spanning business services, manufacturing, technology, and healthcare sectors indicates a generalist approach to target selection rather than sector-specific expertise. No major high-profile campaigns or significant law enforcement actions have been publicly documented against this group by reputable sources, suggesting either a relatively low-impact operational scale or insufficient intelligence collection on their activities. As of current reporting, the group's operational status remains unclear due to limited public documentation from established threat intelligence sources. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on July 1, 2024; most recent post August 31, 2026. The operation is currently active.

Also tracked as: brain cipher.

Timeline of this disclosure

August 31, 2026Adviesbureau De Beuckelaer BV listed by Braincipheron the group's public leak site

Other recent disclosures by Braincipher

Braincipher has been linked to 78 public victims on Darkfield. A sample of the most recent:

See the full Braincipher 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, Adviesbureau De Beuckelaer BV is reported in Netherlands, a country with 42 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Braincipher means Adviesbureau De Beuckelaer BV 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, NCSC-NL (Netherlands), as required for your jurisdiction.
Monitor for the data appearing on Braincipher'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.