Hyundai AutoEver America Breach Incident Score: Analysis & Impact (HYU3392733110725)

In this Rankiteo incident briefing, we review the Hyundai AutoEver America breach identified under incident ID HYU3392733110725.

The analysis begins with a detailed overview of Hyundai AutoEver America's information like the linkedin page: https://www.linkedin.com/company/hyundai-autoever-america, the number of followers: 75117, the industry type: IT Services and IT Consulting and the number of employees: 663 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 714 and after the incident was 621 with a difference of -93 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 Hyundai AutoEver America and their customers.

Hyundai AutoEver America (HAEA) recently reported "Hyundai AutoEver America Data Breach Exposes Personal Data of 2.7 Million Vehicle Owners", a noteworthy cybersecurity incident.

A cyberattack on Hyundai AutoEver America (HAEA), the IT services arm supporting Hyundai, Kia, and Genesis brands, exposed sensitive personal data of up to 2.7 million U.S.

The disruption is felt across the environment, affecting HAEA IT environment and connected vehicle platforms, and exposing Social Security numbers (SSNs), driver’s license details and names, with nearly up to 2.7 million records at risk.

In response, teams activated the incident response plan, and began remediation that includes enhancing security measures, while recovery efforts such as notifying affected customers and offering credit monitoring services continue, and stakeholders are being briefed through public disclosure in November 2025, state filings (Massachusetts, Maine) and customer notifications.

The case underscores how ongoing (as of November 2025), teams are taking away lessons such as Connected vehicle ecosystems are high-value targets for cybercriminals due to vast amounts of sensitive PII, Lack of transparency in breach disclosures can exacerbate reputational damage and erode customer trust and Systemic vulnerabilities in automotive IT infrastructure require robust encryption, multi-factor authentication, and zero-trust architectures, and recommending next steps like {'for_vehicle_owners': ['Freeze credit files to prevent unauthorized access.', 'Enable fraud alerts with credit bureaus.', 'Monitor credit reports regularly for suspicious activity.', 'Consider identity theft protection services.']}, {'for_companies': ['Adopt AI-driven threat detection systems for real-time monitoring.', 'Implement zero-trust architectures and multi-factor authentication (MFA).', 'Conduct regular penetration testing and vulnerability assessments.', 'Enhance employee training on phishing and social engineering threats.', 'Establish clear, timely breach disclosure protocols to maintain transparency.', 'Invest in robust encryption for sensitive data, especially PII.']} and {'for_policymakers': ['Advocate for mandatory breach reporting timelines to ensure swift public disclosure.', 'Develop international standards for automotive data security and connected vehicle cybersecurity.', 'Enforce stricter oversight of data handling practices in the automotive sector.', 'Encourage collaboration between automakers, IT providers, and cybersecurity firms to share threat intelligence.']}, with advisories going out to stakeholders covering State attorneys general notified (Massachusetts, Maine), Legal firms (e.g., Edelson Lechtzin LLP) investigating potential class-action claims and Cybersecurity experts advising on systemic vulnerabilities and mitigation strategies.

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 access to HAEA’s IT environment due to unspecified vulnerabilities and Exploit Public-Facing Application (T1190) with moderate confidence (60%), supported by evidence indicating systemic vulnerabilities in automotive IT infrastructure. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate confidence (60%), supported by evidence indicating potential gaps in encryption and access controls for sensitive PII. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (95%), supported by evidence indicating compromised data including Social Security numbers (SSNs), driver’s license details, names, and PII. Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol (T1048) with high confidence (90%), with evidence including data exfiltration such as true, and hackers gained unauthorized access... compromising sensitive information. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with lower confidence (5%), supported by evidence indicating data encryption such as null (excluded due to lack of evidence) and Data from Cloud Storage (T1530) with moderate to high confidence (80%), supported by evidence indicating connected vehicle platforms affected, implying cloud-hosted PII exposure. Under the Defense Evasion tactic, the analysis identified File Deletion: Delete or Alter Stored Data (T1070.004) with lower confidence (30%), supported by evidence indicating delayed public disclosure (detected March 2025, disclosed November 2025) (possible log tampering). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.