Was Brunnberg & Forshed Arkitektkontor hit by ransomware?

Brunnberg & Forshed Arkitektkontor was listed by the WALLSTREET ransomware operation (Sweden), 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 WALLSTREET ransomware group?

WALLSTREET 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 Brunnberg & Forshed Arkitektkontor breach?

WALLSTREET published data attributed to Brunnberg & Forshed Arkitektkontor. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Brunnberg & Forshed Arkitektkontor

Claimed by Wallstreet · listed 5 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedOct 13, 2026
Data leakeddate unknown

At a glance

Group: Wallstreet
Status: Data leaked
Country: Sweden
Sector: Professional Services
Listed on leak site: Oct 13, 2026

About the victim

AI dossier — public-source company profile

Brunnberg & Forshed Arkitektkontor is a Stockholm-based architecture firm specializing in community buildings and urban development projects.

Industry: Architecture & Urban Planning
Address: Stockholm, Sweden

Attack summary

Severity: low — No proof files, data inventory, or operational impact details are advertised. Only a listing announcement with minimal context.

The Wallstreet group claims to have compromised Brunnberg & Forshed Arkitektkontor and published exfiltrated data. No specific details on data types or encryption are provided in the leak post.

low

What the group claims

Stockholm architecture practice focused on community buildings and urban development

Source

Indexed 5 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 WALLSTREET

WALLSTREET has claimed 5 victims and remains active as of July 2026, operating a single onion mirror. The group's limited victim count makes sector or geographic patterns unclear at this stage. The group has been linked to 39 public disclosures across our corpus. The operation is currently active.

Timeline of this disclosure

October 13, 2026Brunnberg & Forshed Arkitektkontor listed by WALLSTREET on the group's public leak site

Other recent disclosures by WALLSTREET

WALLSTREET has been linked to 39 public victims on Darkfield. A sample of the most recent:

See the full WALLSTREET dossier →

Sector and geography

This disclosure adds to ransomware activity in the Professional Services sector, which has 17 disclosures indexed across all operators we track. Geographically, Brunnberg & Forshed Arkitektkontor is reported in Sweden, a country with 18 ransomware disclosures in our corpus.

If your organisation is affected

A listing by WALLSTREET means Brunnberg & Forshed Arkitektkontor 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-SE (Sweden), as required for your jurisdiction.
Monitor for the data appearing on WALLSTREET'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.