Cyber Threat Intelligence
Today In Cyber Sponsor Today In Cyber
FE
Ransomware Victim Construction

FENSTERMAKER

Ransomware attack by Monti Β· Disclosed January 30, 2025 Β· πŸ‡ΊπŸ‡Έ United States

fenstermaker.com

Date Disclosed
Jan 30, 2025
2025
Threat Group
Monti
63 total victims
Country
πŸ‡ΊπŸ‡Έ United States
Industry
Construction

Incident Analysis

FENSTERMAKER was targeted by Monti ransomware, one of the most active ransomware groups in our database with 63 confirmed victims globally. The attack was disclosed on January 30, 2025, when FENSTERMAKER appeared on the group's dark web leak site.

FENSTERMAKER is based in United States , operating in the Construction sector. United States ranks #1 globally for ransomware attacks, with 8,959 victims in our database.

Sector context: Construction firms often hold sensitive project data, client financials, and intellectual property. The industry's typically lean IT security teams can make them more vulnerable.

Monti 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 β€” 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: Aug 1, 2026 02:00 UTC.

Frequently Asked Questions

Was FENSTERMAKER attacked by ransomware?

Yes. FENSTERMAKER was listed as a victim of the Monti ransomware group on January 30, 2025. The organisation is based in United States and operates in the Construction sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked FENSTERMAKER?

FENSTERMAKER was attacked by Monti ransomware. Monti is one of the most active ransomware groups, having claimed 63 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the FENSTERMAKER ransomware attack occur?

The ransomware attack on FENSTERMAKER was disclosed on January 30, 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 FENSTERMAKER ransomware attack?

The specific data stolen from FENSTERMAKER 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 Construction organisation, FENSTERMAKER likely held sensitive business data, client information, and operational records.

How can organisations protect against Monti attacks?

To defend against Monti 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.