Cyber Threat Intelligence
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Ransomware Victim Healthcare

felixvet.com

Ransomware attack by Lockbit5 · Disclosed December 7, 2025 · 🇧🇬 Bulgaria

felixvet.com

Date Disclosed
Dec 7, 2025
2025
Threat Group
Lockbit5
354 total victims
Country
🇧🇬 Bulgaria
Industry
Healthcare

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Lockbit5. Figures and technique mappings are quoted from the source data, not inferred.

About the Lockbit5 group

LockBit 5.0 ("ChuongDong") emerged in September 2025 as the group's resurgence following the February 2024 law enforcement takedown, introducing cross-platform payloads targeting Windows, Linux, and VMware ESXi with enhanced evasion capabilities and continuing the RaaS affiliate model of its predecessors. Lockbit5 has listed 330 victims since April 2023.

Incident Analysis

felixvet.com was targeted by Lockbit5 ransomware, one of the most active ransomware groups in our database with 354 confirmed victims globally. The attack was disclosed on December 7, 2025, when felixvet.com appeared on the group's dark web leak site.

felixvet.com is based in Bulgaria , operating in the Healthcare sector. Bulgaria ranks #60 globally for ransomware attacks, with 21 victims in our database.

Sector context: Healthcare organisations are high-value ransomware targets because patient data is extremely sensitive, regulatory penalties for breaches are severe, and operational downtime can threaten patient safety — all factors that increase ransom payment pressure.

Lockbit5 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 felixvet.com attacked by ransomware?

Yes. felixvet.com was listed as a victim of the Lockbit5 ransomware group on December 7, 2025. The organisation is based in Bulgaria and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked felixvet.com?

felixvet.com was attacked by Lockbit5 ransomware. Lockbit5 is one of the most active ransomware groups, having claimed 354 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the felixvet.com ransomware attack occur?

The ransomware attack on felixvet.com was disclosed on December 7, 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 felixvet.com ransomware attack?

The specific data stolen from felixvet.com 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 Healthcare organisation, felixvet.com likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Lockbit5 attacks?

To defend against Lockbit5 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.