AllerVie Health Breach Incident Score: Analysis & Impact (ALL1766599463)

In this Rankiteo incident briefing, we review the AllerVie Health breach identified under incident ID ALL1766599463.

The analysis begins with a detailed overview of AllerVie Health's information like the linkedin page: https://www.linkedin.com/company/allervie-health, the number of followers: 3401, the industry type: Hospitals and Health Care and the number of employees: 205 employees

After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 762 and after the incident was 659 with a difference of -103 which is could be a good indicator of the severity and impact of the incident.

In the next step of the video, we will analyze in more details the incident and the impact it had on AllerVie Health and their customers.

On 23 December 2025, AllerVie Health disclosed Ransomware Attack issues under the banner "AllerVie Health Ransomware Attack and Data Breach".

AllerVie Health disclosed a significant data breach exposing personally identifiable information (PII) of a limited number of individuals due to a ransomware attack by the ANUBIS group.

The disruption is felt across the environment, and exposing Personally identifiable information (PII), including Social Security numbers, driver’s license or state ID numbers, and names.

In response, teams activated the incident response plan, and stakeholders are being briefed through Notification to affected individuals by mail, call center setup for inquiries.

The case underscores how Ongoing, and recommending next steps like Sign up for free Cyberscout identity theft protection services, monitor credit reports and financial accounts, be alert for phishing attempts, consider placing a fraud alert or credit freeze with major credit bureaus, with advisories going out to stakeholders covering Notification by mail, call center setup (833-877-1419, Monday through Friday, 8 a.m. to 8 p.m. ET).

Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.

The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.

Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (70%), supported by evidence indicating unauthorized actors had accessed sensitive PII between Oct. 24 and Nov. 3, 2025 and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating healthcare organizations targeted; no specific vector disclosed. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate confidence (60%), supported by evidence indicating ransomware attack by ANUBIS group; likely required user interaction. Under the Persistence tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (70%), supported by evidence indicating access maintained for 10 days (Oct. 24 - Nov. 3, 2025). Under the Privilege Escalation tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating access to high-sensitivity PII (SSNs, drivers licenses). Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate to high confidence (80%), supported by evidence indicating ransomware encrypted data; ANUBIS group known for evasion tactics and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating undetected for 10 days; likely disabled monitoring tools. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with moderate confidence (50%), supported by evidence indicating access to PII suggests possible credential harvesting. Under the Discovery tactic, the analysis identified Account Discovery (T1087) with moderate to high confidence (70%), supported by evidence indicating targeted high-value PII; likely performed account enumeration and File and Directory Discovery (T1083) with moderate to high confidence (70%), supported by evidence indicating located SSNs, drivers licenses, and names for exfiltration. Under the Lateral Movement tactic, the analysis identified Remote Services: Remote Desktop Protocol (T1021.001) with moderate confidence (60%), supported by evidence indicating healthcare networks often use RDP; no specific vector disclosed. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating compromised SSNs, drivers licenses, and patient names. Under the Command and Control tactic, the analysis identified Application Layer Protocol: Web Protocols (T1071.001) with moderate to high confidence (70%), supported by evidence indicating aNUBIS group posted on Tor network; likely used C2 over web. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating threatened to leak stolen data unless ransom demands met. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (100%), supported by evidence indicating ransomware encrypted data; ANUBIS group responsible and Defacement: Internal Defacement (T1491.001) with moderate to high confidence (70%), supported by evidence indicating ransomware attack; likely left ransom note or defaced systems. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.