FEI Systems Breach Incident Score: Analysis & Impact (FEIMIN1768948386)

In this Rankiteo incident briefing, we review the FEI Systems breach identified under incident ID FEIMIN1768948386.

The analysis begins with a detailed overview of FEI Systems's information like the linkedin page: https://www.linkedin.com/company/fei-systems2, the number of followers: 24114, the industry type: IT Services and IT Consulting and the number of employees: 449 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 754 and after the incident was 577 with a difference of -177 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 FEI Systems and their customers.

On 18 November 2025, Minnesota Department of Human Services (DHS) disclosed Data Breach issues under the banner "Minnesota Agency Reports 304,000-Person Data Breach Linked to Vendor Access Misuse".

The Minnesota Department of Human Services (DHS) has notified nearly 304,000 individuals of a data breach involving unauthorized access to its MnChoices system, a platform used by counties, tribal nations, and managed care organizations to assess eligibility for long-term serv...

The disruption is felt across the environment, affecting MnChoices system, and exposing Demographic details, names, addresses, dates of birth, Medicaid IDs, partial Social Security numbers, ethnicity, race, financial eligibility details, and program-specific data, with nearly 303,965 (plus 1,206 with additional exposure) records at risk.

In response, moved swiftly to contain the threat with measures like Access revoked for the provider on October 30, 2025, and stakeholders are being briefed through Notification to affected individuals.

The case underscores how Ongoing (DHS Office of Inspector General monitoring billing records for fraud), with advisories going out to stakeholders covering Notification sent to affected individuals.

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 high confidence (90%), with evidence including worker affiliated with a licensed healthcare provider accessed data, and user had legitimate access to limited information. Under the Credential Access tactic, the analysis identified Credentials from Cloud Instance Metadata API (T1552.006) with lower confidence (30%), supported by evidence indicating third-party vendor FEI Systems managed the MnChoices system. Under the Privilege Escalation tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), with evidence including retrieved more data than necessary for their role, and accessed data beyond their authorized scope. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating demographic details, names, addresses, dates of birth, Medicaid IDs compromised and Data from Information Repositories (T1213) with high confidence (90%), supported by evidence indicating unauthorized access to MnChoices system for eligibility assessments. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate confidence (50%), supported by evidence indicating 303,965 individuals affected by data exposure and Transfer Data to Cloud Account (T1537) with lower confidence (40%), supported by evidence indicating third-party vendor FEI Systems managed the system. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (20%), supported by evidence indicating no evidence of external hacking or data destruction mentioned and Stored Data Manipulation (T1565.001) with lower confidence (30%), supported by evidence indicating dHS monitoring billing records for potential fraud. Under the Defense Evasion tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating worker had legitimate access, evaded detection until November 18. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.