Incident Score: Analysis & Impact (MUT1774297989)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Mutual of America Financial Group's Breach and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Mutual of America Financial Group Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Mutual of America Financial Group breach identified under incident ID MUT1774297989.
The analysis begins with a detailed overview of Mutual of America Financial Group's information like the linkedin page: https://www.linkedin.com/company/mutualofamerica, the number of followers: 25810, the industry type: Financial Services and the number of employees: 1024 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 721 and after the incident was 652 with a difference of -69 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 Mutual of America Financial Group and their customers.
On 23 March 2026, Mutual of America Life Insurance Co. disclosed Data Breach issues under the banner "Mutual of America Life Insurance Data Breach".
Mutual of America Life Insurance Co.
The disruption is felt across the environment, and exposing Names, Social Security numbers, driver’s license numbers.
In response, and began remediation that includes Offering 12 months of free credit monitoring, identity restoration support, and $1 million in identity theft insurance, and stakeholders are being briefed through Notification letters to affected individuals, dedicated assistance line (883-918-9653), notifications to state regulators and credit bureaus.
The case underscores how Completed (forensic analysis and review), with advisories going out to stakeholders covering Notification letters with enrollment details for credit monitoring, deadline of June 30, 2026.
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.
MITRE ATT&CK® Correlation Analysis
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 sensitive files within its network and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating suspicious activity prompted an internal investigation. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate confidence (60%), supported by evidence indicating access to sensitive files containing SSNs, driver’s license numbers and OS Credential Dumping (T1003) with moderate confidence (50%), supported by evidence indicating unauthorized parties accessed or copied files over 15 days. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating exposed data included names, SSNs, driver’s license numbers. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating unauthorized parties accessed or copied files between Nov 14-29, 2025. Under the Impact tactic, the analysis identified Data Manipulation: Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating high identity theft risk due to exposed PII and Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no details on extent of breach or data integrity. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Mutual of America Financial Group Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/mutualofamerica/incident/MUT1774297989
- Mutual of America Financial Group CyberSecurity Rating page: https://www.rankiteo.com/company/mutualofamerica
- Mutual of America Financial Group Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/mut1774297989-mutual-of-america-life-insurance-co-breach-november-2025/
- Mutual of America Financial Group CyberSecurity Score History: https://www.rankiteo.com/company/mutualofamerica/history
- Mutual of America Financial Group CyberSecurity Incident Source: https://www.claimdepot.com/data-breach/mutual-of-america-2026
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf