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high severity July 16, 2023 · 3 min read Unverified claim — what this is

www.arb.ch Listed by abyss Ransomware Group

If you are a customer of www.arb.ch, here’s what is being claimed, and what it would mean for you.

arb Architekten AG, 220Gb uncompressed data

— from Abyss’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
www.arb.ch Listed by abyss Ransomware Group

On July 16, 2023, Swiss architecture firm arb Architekten AG appeared on the leak site of the abyss ransomware group. The listing states that attackers exfiltrated 220Gb of uncompressed internal files from the company, known online as www.arb.ch. The number of people whose personal information is contained in those files remains unknown.

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Details in the Leak Listing

The primary disclosure on the abyss leak site states that arb Architekten AG suffered a ransomware attack in which internal files were taken. It does not specify the exact data types inside the 220Gb archive, nor does it list individual record counts or name the systems initially compromised. The posting follows the group’s standard format: an announcement of successful exfiltration followed by a demand for payment to prevent release of the full dataset. As of the listing date, the firm had not issued a separate public breach notification detailing the incident.

Why This Matters for You and Your Family

When an architecture company’s internal files are stolen, the exposure often reaches beyond corporate documents. Client contracts, employee records, project invoices, and correspondence can contain names, addresses, dates of birth, phone numbers, email addresses, and financial details. If your family has ever worked with an architect, hired a contractor through a Swiss firm, or appeared in building-permit records tied to arb Architekten AG, your information may now sit inside the 220Gb archive. Once posted on a ransomware leak site, that data can be downloaded by anyone and reused for identity theft, phishing, or further extortion.

The Doxxing and Identity-Chain Risk

Ransomware leaks rarely stop at one company. A single exposed email or phone number can link your professional life to personal accounts, social-media handles, and even children’s gaming profiles. Attackers chain these fragments together to build complete identity dossiers. Public records that once seemed harmless suddenly become dangerous when paired with data from a breach like this one. Credential leaks of this nature frequently cascade into account takeovers on gaming platforms, where children’s usernames and shared family passwords are reused.

Abyss Ransomware Group Track Record

Public reporting attributes the abyss group with emerging in late 2022 and focusing on double-extortion tactics: encrypting victim systems while simultaneously exfiltrating data for later public release. Notable prior victims include mid-sized firms across Europe and North America, many in professional services sectors. The group’s typical playbook begins with initial access through compromised remote desktop credentials or phishing, followed by lateral movement, data exfiltration, and then publication on their leak site with countdown timers. They do not always deploy the loudest ransomware strains, preferring quiet theft and targeted pressure on victims who hope the incident will stay private.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity, with cleanup handled by the service.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next exposure surfaces in hours rather than months.
  • Rotate any password you used at arb Architekten AG or related vendor portals anywhere it has been reused, and switch to 2FA through an authenticator app instead of SMS.
  • Cover the entire household with DoxxScan family protection that extends to dependents and children’s gaming accounts commonly chained to the same address or email.
  • Let remediation specialists manage takedown requests for any personal data already appearing on broker sites or forums tied to this incident.

The breach of arb Architekten AG shows how quickly professional-service data can become personal exposure for ordinary families. Acting quickly on credential hygiene and identity mapping limits how far attackers can travel down the chain. DoxxScan by GalaxyWarden delivers continuous monitoring across 13.1 billion+ breach records and more than 100 platforms, AI-powered identity-chain mapping, hands-on remediation by specialists, and full household coverage that includes children’s gaming accounts at risk from cascading credential leaks. Start your DoxxScan trial today to close the gaps this incident has opened.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

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www.arb.ch is one listing. Your email is probably in others.
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Report details & sourcing

Severity High the filing does not enumerate what was exposed
Disclosed July 16, 2023
Last reviewed August 8, 2026
Affected Unconfirmed
Unverified claim — what this report is
This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
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