Skip to main content
Darkfield

Ransomware victim disclosure

← All victims

Peterson & Hansson Byggnads AB

listed as PETERSON & HANSON · Claimed by Blackbyte · listed 4 years ago

44m
Age
since listed · data leaked

Status timeline

  1. ListedNov 5, 2022
  2. Data leakeddate unknown

At a glance

Group
Blackbyte
Status
Data leaked
Country
Sweden
Sector
Construction
Listed on leak site
Nov 5, 2022

About the victim

AI dossier — public-source company profile

Peterson & Hansson Byggnads AB is a Swedish construction company based in Falkenberg, Halland, operating since 1963. The company provides construction services across the Halland region and surrounding areas, with offices in Falkenberg, Halmstad, Varberg, and Laholm. It is described as one of Halland's largest construction companies, serving repeat and satisfied customers.

Industry
Construction Services
Address
Badhusvägen 53, 311 32 Falkenberg, Sweden
Founded
1963

Attack summary

Severity: high — Data has been published by the group, indicating confirmed exfiltration and public disclosure of company data, which constitutes a significant breach even without explicit details on data type or volume.

Blackbyte claims to have attacked Peterson & Hansson Byggnads AB and has published data (disclosed status: data_published), though the specific nature of the attack (encryption, exfiltration, or both) and the volume of stolen data are not explicitly stated in the leak post.

high

What the group claims

WE ARE PETERSON & HANSON BYGGNADS ABWith environment, competence and well-being at the top of the agenda, we perform construction services in Halland and the surrounding area for satisfied and returning customers.We have been in the industry since 1963 and are one of Halland's largest construction companies.

Sources

Source

Indexed 4 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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

  • November 5, 2022PETERSON & HANSON listed by Blackbyteon the group's public leak site

Other recent disclosures by Blackbyte

Blackbyte has been linked to 147 public victims on Darkfield. A sample of the most recent:

See the full Blackbyte dossier →

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 988 disclosures indexed across all operators we track. Geographically, PETERSON & HANSON is reported in Sweden, a country with 111 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blackbyte means PETERSON & HANSON 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 Blackbyte'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.