Summary
On December 5, 2025, the ransomware group Nova publicly claimed responsibility for a cyberattack against National Health Insurance Management Authority, a key institution in Zambia’s healthcare sector. The group has threatened to leak confidential patient data unless negotiations are initiated.
Incident Report
| Field | Details |
|---|---|
| Target | National Health Insurance Management Authority |
| Domain | N/A |
| Country | Zambia |
| Attacking Group | Nova |
| Date Reported | December 5, 2025 |
| Threat Actor Statement | “The National Health Insurance Scheme (NHIS) provides access to quality healthcare services, essential medicines, and state-of-the-art medical equipment. It aims to facilitate equitable contributions and access to healthcare for individuals and families, protecting them against catastrophic healthcare expenditures. NHIS offers a variety of benefit packages and allows companies to register their employees for coverage. The organization serves clients seeking affordable and convenient healthcare solutions – patients data exf, navigate us to deal samples provided” |
Recommended Security Actions
Ransomware attacks are increasingly targeting both enterprise and mid-sized organizations across all sectors. The following steps are critical to reduce impact and prevent future incidents:
- Monitor continuously: Use DeXpose’s dark web and infostealer monitoring platform to detect breached credentials, leaked databases, and threat actor chatter in near real-time—before damage spreads internally.
- Conduct a compromise assessment: Immediately initiate a full incident review to determine how attackers infiltrated your network, what data may have been exfiltrated, and whether any persistence mechanisms remain active.
- Validate your backups: Ensure that your backups are current, encrypted, and stored offline. Utilize immutable backup solutions to defend against ransomware encryption and deletion attempts.
- Apply threat intelligence: Integrate external threat feeds, including DeXpose-provided indicators of compromise (IOCs), into your SIEM or XDR platforms for real-time alerting and correlation.
- Harden employee defenses: Run phishing simulations and enforce multi-factor authentication (MFA) across all access points. Attackers often exploit weak or reused credentials sourced from the dark web.
- Engage professional response teams: Involve cybersecurity incident response experts, threat analysts, and legal counsel before initiating any dialogue with ransomware groups or ransom brokers.
How DeXpose Helps You Stay Ahead
At DeXpose, we specialize in early detection and proactive defense. Our hybrid threat intelligence solution combines automated deep/dark web crawling, Telegram and forum monitoring, and real analyst verification to deliver:
- Continuous scanning of ransomware group leak sites, stolen credential markets, and malware log dumps
- Timely alerts for breaches linked to your domains, email addresses, and key personnel
- Intelligence correlation that connects leaked credentials to infostealer malware infections, often weeks before a public ransom demand
- Real-time visibility into supply chain and third-party exposures through passive surveillance of dark web channels
Don’t wait for public disclosure or ransom notices—gain visibility into your cyber exposure now.
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Disclaimer
DeXpose does not engage in the exfiltration, hosting, redistribution, or purchase of stolen data. All breach information reported here is collected from publicly accessible dark web sources and threat intelligence platforms.
Our mission is to equip organizations with early-warning indicators, contextual threat insights, and actionable intelligence that help them secure their digital assets against evolving cyber threats.
