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interfides Steuerberatungsgesellschaft mbH

listed as interfides.de · Claimed by Werewolves · listed 3 years ago

31m
Age
since listed · data leaked

Status timeline

  1. ListedDec 20, 2023
  2. Data leakeddate unknown

At a glance

Group
Werewolves
Status
Data leaked
Country
Germany
Sector
Business Services
Listed on leak site
Dec 20, 2023

About the victim

AI dossier — public-source company profile

interfides Steuerberatungsgesellschaft mbH is a German tax consulting firm founded in 1978 specializing in advising foreign entrepreneurs and companies with business activities in Germany. Based in Munich with additional presence in Berlin, they offer comprehensive tax advisory, accounting, payroll, and legal consulting services (through affiliated counsel) across international tax matters.

Industry
Tax Consulting & Business Advisory Services
Address
Elsenheimerstr. 67, 80687 München, Germany
Founded
1978

Attack summary

Severity: medium — Disclosed status indicates data_published, but no proof files, ransom demand, or specific data inventory is mentioned in the provided post. Tax consulting firms handle sensitive client financial and tax information; however, without confirmation of exfiltration scope or specific regulated data categories, severity is assessed as medium rather than high.

The werewolves group claims to have compromised interfides and published data. The group's post does not specify whether data was exfiltrated, encrypted, or both, nor does it detail the scope of data affected.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • client records
  • tax documentation
  • business advisory files
  • potentially PII of foreign business clients

What the group claims

interfides Steuerberatungsgesellschaft mbH was established in 1978, and specialises in providing advisory services to foreign clients with a business presence in Germany.

Sources

Source

Indexed 3 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 werewolves

The Werewolves ransomware group is a relatively new financially-motivated cybercriminal organization that emerged in December 2023, with limited public documentation available from major threat intelligence sources. Based on available targeting data, the group appears to operate with a focus on business services and manufacturing sectors, having compromised 26 known victims across multiple countries including Russia, the United States, Netherlands, Germany, and France. The group's targeting pattern suggests they may employ opportunistic attack vectors rather than highly sophisticated initial access methods, though specific technical details about their encryption methods, data exfiltration practices, or operational structure remain undocumented by major security research organizations. Due to the group's recent emergence and relatively small victim count, there are no publicly reported high-profile campaigns or significant law enforcement actions against them. The current operational status of Werewolves remains unclear given the limited threat intelligence reporting available from established cybersecurity firms and government agencies. The group has been linked to 26 public disclosures across our corpus. First observed on a leak site on December 20, 2023; most recent post March 13, 2024. The operation is currently inactive.

Timeline of this disclosure

  • December 20, 2023interfides.de listed by werewolveson the group's public leak site

Other recent disclosures by werewolves

werewolves has been linked to 26 public victims on Darkfield. A sample of the most recent:

See the full werewolves dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, interfides.de is reported in Germany, a country with 926 ransomware disclosures in our corpus.

If your organisation is affected

A listing by werewolves means interfides.de 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 werewolves'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.