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W.H. Müller GmbH & Co. KG

listed as WH Müller · Claimed by Deadlock · listed 5 days ago

4d
Age
since listed · data leaked

Status timeline

  1. ListedJul 10, 2026
  2. Data leakeddate unknown

At a glance

Group
Deadlock
Status
Data leaked
Country
Germany
Sector
Manufacturing
Listed on leak site
Jul 10, 2026

About the victim

AI dossier — public-source company profile

W.H. Müller is a family-owned German company founded in 1926 in Frankfurt am Main, specializing in electrical engineering (building installations, lighting systems, emergency power, telecommunications) and IT technology services (networking, antivirus solutions, systems integration). The company employs 60 staff at its headquarters in Frankfurt-Sossenheim and serves both corporate and residential customers.

Industry
Electrical Engineering & IT Technology Services
Address
Westerbachstraße 120, 65936 Frankfurt am Main, Germany
Employees
60
Founded
1926

Attack summary

Severity: low — No proof files or screenshots are referenced in the truncated leak post; no specific data categories or operational impact are stated; disclosure is limited to a generic claim of attack with no supporting evidence of actual data exfiltration or encryption impact.

Deadlock claims to have attacked W.H. Müller and published data from the company. The leak post provides no specific detail on whether encryption, exfiltration, or both occurred, nor does it specify what data categories were compromised.

low

What the group claims

WH Müller is a family business in the field of electrical engineering and IT technology.

Sources

Source

Indexed 5 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 Deadlock

Deadlock is a ransomware group first observed in June 2026 with an apparent financial motivation, having claimed responsibility for attacks against at least 10 known victims across a geographically diverse target set. Given the recency of their emergence and limited public documentation by major threat intelligence organizations such as CISA, FBI, or Mandiant at this time, a comprehensive technical profile cannot be fully established. Based on available victimology data, the group has demonstrated a targeting pattern spanning Singapore, China, Sweden, Spain, and Nigeria, suggesting an opportunistic or globally distributed operational scope rather than a regionally focused campaign. Targeted sectors include manufacturing, business services, telecommunications, and financial services, indicating a preference for industries with high operational dependencies and potential for significant disruption, which is consistent with financially motivated ransomware actors seeking maximum leverage for ransom payment. No confirmed attribution regarding country of origin, RaaS affiliation, or specific tooling has been publicly documented by authoritative sources as of this profile's preparation. Due to the group's nascent operational timeline and the limited volume of publicly verified intelligence, analysts should treat this profile as preliminary and subject to significant revision as additional technical indicators, victim disclosures, and research reporting become available. Continued monitoring is advised given the cross-sector and cross-regional targeting behavior observed in this early operational phase. The group has been linked to 76 public disclosures across our corpus. First observed on a leak site on June 15, 2026; most recent post July 12, 2026. The operation is currently active.

Timeline of this disclosure

  • July 10, 2026WH Müller listed by Deadlockon the group's public leak site

Other recent disclosures by Deadlock

Deadlock has been linked to 76 public victims on Darkfield. A sample of the most recent:

See the full Deadlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, WH Müller is reported in Germany, a country with 379 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Deadlock means WH Müller 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 Deadlock'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.