Was Linnecken Partner hit by ransomware?

Linnecken Partner was listed by the thegentlemen ransomware operation (Germany), 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 thegentlemen ransomware group?

thegentlemen 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 Linnecken Partner breach?

thegentlemen published data attributed to Linnecken Partner. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Linnecken & Partner

listed as Linnecken Partner · Claimed by Thegentlemen · listed 7 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedJun 15, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Germany
Sector: Business Services
Listed on leak site: Jun 15, 2026

About the victim

AI dossier — public-source company profile

Linnecken & Partner is a German tax advisory and law firm based in Wentorf near Hamburg, specializing in comprehensive tax consulting, financial planning, and legal services for healthcare professionals, doctors, and medical centers. Operating since 1977, the firm provides integrated tax, business management, and legal counsel tailored to the healthcare sector.

Industry: Tax & Legal Advisory Services (Healthcare Specialization)
Address: Feldstraße 4, 21465 Wentorf bei Hamburg, Germany
Founded: 1977

Attack summary

Severity: high — Confirmed data exfiltration from a professional services firm handling sensitive client data (PII, financial, and medical records of healthcare practitioners). Data involves regulated healthcare sector clientele with significant compliance and privacy implications under German and EU data protection law.

TheGentlemen ransomware group claims to have breached Linnecken & Partner and exfiltrated data. The group has published the company name and details on their leak site, indicating data disclosure.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client records (doctors, dentists, healthcare practitioners)
Tax and financial documentation
Legal client files
Business plans and financial projections
Medical practice operational data

What the group claims

***.de zoominfo.com/c/linnecken--partner/509433943 Linnecken & Partner is a renowned German tax and legal advisory firm based in Wentorf near Hamburg, proudly serving clients since 1977. They specialize exclusively in providing comprehensive tax consulting, financial planning, and legal services tailored specifically for healthcare professionals, doctors, and medical centers. With decades of niche expertise, the firm ensures that medical practitioners receive reliable support in navigating complex medical law, employment regulations, and business management

Sources

Victim sitelinnecken-partner.de

Source

Indexed 7 hours 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 504 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 15, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

June 15, 2026Linnecken Partner listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 504 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,795 disclosures indexed across all operators we track. Geographically, Linnecken Partner is reported in Germany, a country with 378 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Linnecken Partner 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 thegentlemen'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.