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Ransomware Victim Business Services

immobilia.hu

Ransomware attack by J · Disclosed June 1, 2025 · 🇭🇺 Hungary

immobilia.hu

Date Disclosed
Jun 1, 2025
2025
Threat Group
J
41 total victims
Country
🇭🇺 Hungary
Industry
Business Services

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for J. Figures and technique mappings are quoted from the source data, not inferred.

About the J group

J is an emerging ransomware group that launched its leak site in May 2025, claiming over 41 victims by late 2025 including FAI Aviation Group (Germany), operating primarily as a leak-site-centric extortion identity with limited public technical analysis. J has listed 41 victims since February 2025.

Incident Analysis

immobilia.hu was targeted by J ransomware, one of the most active ransomware groups in our database with 41 confirmed victims globally. The attack was disclosed on June 1, 2025, when immobilia.hu appeared on the group's dark web leak site.

immobilia.hu is based in Hungary , operating in the Business Services sector. Hungary ranks #53 globally for ransomware attacks, with 24 victims in our database.

Sector context: Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

J typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 6, 2026 22:00 UTC.

Frequently Asked Questions

Was immobilia.hu attacked by ransomware?

Yes. immobilia.hu was listed as a victim of the J ransomware group on June 1, 2025. The organisation is based in Hungary and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked immobilia.hu?

immobilia.hu was attacked by J ransomware. J is one of the most active ransomware groups, having claimed 41 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the immobilia.hu ransomware attack occur?

The ransomware attack on immobilia.hu was disclosed on June 1, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the immobilia.hu ransomware attack?

The specific data stolen from immobilia.hu has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Business Services organisation, immobilia.hu likely held sensitive business data, client information, and operational records.

How can organisations protect against J attacks?

To defend against J and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.