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Ransomware Victim

One-LUX

Ransomware attack by Cephalus · Disclosed August 29, 2025 · 🇬🇧 United Kingdom

one-lux.com

Date Disclosed
Aug 29, 2025
2025
Threat Group
Cephalus
19 total victims
Country
🇬🇧 United Kingdom
Industry
—

ThreatAI Analysis

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

About the Cephalus group

Cephalus is a ransomware group active from mid-2025 that leverages stolen RDP credentials to deploy a Go-based ransomware payload via DLL sideloading, targeting law firms, healthcare, financial services, and IT firms across the US and Japan with 19 known victims. Cephalus has listed 19 victims since June 2025.

Incident Analysis

One-LUX was targeted by Cephalus ransomware, one of the most active ransomware groups in our database with 19 confirmed victims globally. The attack was disclosed on August 29, 2025, when One-LUX appeared on the group's dark web leak site.

One-LUX is based in United Kingdom . United Kingdom ranks #4 globally for ransomware attacks, with 897 victims in our database.

Cephalus 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 11, 2026 14:00 UTC.

Frequently Asked Questions

Was One-LUX attacked by ransomware?

Yes. One-LUX was listed as a victim of the Cephalus ransomware group on August 29, 2025. The organisation is based in United Kingdom. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked One-LUX?

One-LUX was attacked by Cephalus ransomware. Cephalus is one of the most active ransomware groups, having claimed 19 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the One-LUX ransomware attack occur?

The ransomware attack on One-LUX was disclosed on August 29, 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 One-LUX ransomware attack?

The specific data stolen from One-LUX 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. Sensitive business data was likely targeted.

How can organisations protect against Cephalus attacks?

To defend against Cephalus 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.