Was amw-treuhand.ch hit by ransomware?

amw-treuhand.ch was listed by the LockBit ransomware operation (Switzerland), 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 LockBit ransomware group?

LockBit 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 amw-treuhand.ch breach?

LockBit published data attributed to amw-treuhand.ch. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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AMW Treuhand & Immobilien AG

listed as amw-treuhand.ch · Claimed by LockBit · listed 7 months ago

Age

since listed · data leaked

Status timeline

ListedDec 26, 2025
Data leakeddate unknown

At a glance

Group: LockBit
Status: Data leaked
Country: Switzerland
Sector: Financial Services
Listed on leak site: Dec 26, 2025

About the victim

AI dossier — public-source company profile

AMW Treuhand & Immobilien AG is a Swiss fiduciary and real estate services firm headquartered in Brüttisellen, Canton Zurich. The company offers integrated accounting, payroll, tax advisory, and property management services, including a proprietary cloud-based all-in-one fiduciary solution called amw.one built on Abacus SaaS. It also operates as a real estate agency handling rentals, condominium management, and property sales.

Industry: Fiduciary, Accounting & Real Estate Services
Address: Fabrikweg 2, CH-8306 Brüttisellen, Switzerland

Attack summary

Severity: high — Data has been confirmed published by LockBit. As a fiduciary and accounting firm, AMW Treuhand holds sensitive regulated financial, tax, and payroll data for numerous business and individual clients, representing significant exposure of confidential third-party financial records.

LockBit claims to have attacked AMW Treuhand & Immobilien AG and has published data (disclosed status: data_published), indicating exfiltration of company data. No ransom amount or specific data volume was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client financial records
Tax documents
Payroll and personnel data
Real estate transaction documents
Business accounting data
Contact and personal identification information

What the group claims

AMW Treuhand & Immobilien AG ist ein Dienstleistungsunternehmen in Brüttisellen, das sich auf Fi...

Sources

Victim siteamw-treuhand.ch

Source

Indexed 7 months 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 LockBit

LockBit is a highly prolific ransomware group that emerged in October 2020 and has become one of the most active ransomware operations globally, with over 3,500 documented victims and a primary motivation of financial gain through extortion. The group is suspected to originate from Russia and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while providing them with ransomware tools, infrastructure, and support. LockBit primarily gains initial access through exploiting vulnerabilities in public-facing applications, credential stuffing attacks, and phishing campaigns, employing double extortion tactics where they steal sensitive data before encrypting systems and threatening to leak the information if ransom demands are not met. The group has demonstrated significant technical sophistication, developing multiple variants including LockBit 3.0 (also known as LockBit Black), and has been particularly active in targeting business services, manufacturing, technology, and healthcare sectors across the United States, France, Germany, United Kingdom, and Italy. Despite ongoing law enforcement efforts and international cooperation to disrupt their operations, including seizures of infrastructure and arrests of affiliates, LockBit has shown resilience and adaptability, continuing to operate and evolve their tactics while maintaining their position as one of the most dominant ransomware threats in the cybercriminal landscape. The group has been linked to 3,536 public disclosures across our corpus. First observed on a leak site on October 21, 2020; most recent post March 30, 2026. The operation is currently active.

Also tracked as: LockBit 3.0, LockBit Black, LockBit Green, ABCD ransomware.

Timeline of this disclosure

December 26, 2025amw-treuhand.ch listed by LockBiton the group's public leak site

Other recent disclosures by LockBit

LockBit has been linked to 3,536 public victims on Darkfield. A sample of the most recent:

See the full LockBit dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,184 disclosures indexed across all operators we track. Geographically, amw-treuhand.ch is reported in Switzerland, a country with 154 ransomware disclosures in our corpus.

If your organisation is affected

A listing by LockBit means amw-treuhand.ch 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-CH (Switzerland), as required for your jurisdiction.
Monitor for the data appearing on LockBit'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.