Summary
On January 19, 2026, the ransomware group Sinobi claimed responsibility for a cyberattack against
Avalon Hills (avalonhills.org), a notable healthcare provider in the USA.
The group has threatened to leak sensitive data unless negotiations are resumed.
Incident Report
| Field | Details |
|---|---|
| Target | Avalon Hills |
| Domain | avalonhills.org |
| Country | USA |
| Attacking Group | Sinobi |
| Date Reported | January 19, 2026 |
| Threat Actor Statement | “The Avalon Hills business staff work behind the scenes to help manage all aspects of the program. They route calls, assist with travel plans for clients and families, track all things financial, keep all of the technical machines purring and whatever else it takes to keep a busy program in business! The financial office and utilization review team partners with families to help them access and maximize their insurance benefits. This requires the dedication of families to expand the financial resources available to them for treatment. We help those struggling with an eating disorder recover through a combination of the best, tried-and-true traditional psychotherapies and applied neuroscience, including the latest discoveries about human brain plasticity. Prior to arriving at Avalon Hills, our 21 year-old daughter struggled with a life-threatening eating disorder for over 4 years.” |
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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Check employee or partner email exposure:
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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.
