Incident Score: Analysis & Impact (TIA1773398169)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of TIAA's Ransomware 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 TIAA 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 TIAA breach identified under incident ID TIA1773398169.
The analysis begins with a detailed overview of TIAA's information like the linkedin page: https://www.linkedin.com/company/tiaa, the number of followers: 241357, the industry type: Financial Services and the number of employees: 13272 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 615 and after the incident was 459 with a difference of -156 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 TIAA and their customers.
University of Phoenix recently reported "Ransomware Attacks on Education Sector Surge in 2025, U.S. Hit Hardest", a noteworthy cybersecurity incident.
Ransomware attacks on educational institutions worldwide reached 251 incidents in 2025, with the U.S.
The disruption is felt across the environment, and exposing 3.89 million records (U.S.), 3.6 million records (Cl0p attacks globally), with nearly 3.89 million (U.S.), 3.6 million (Cl0p attacks globally) records at risk.
Formal response steps have not been shared publicly yet.
The case underscores how teams are taking away lessons such as Growing sophistication of ransomware gangs and vulnerabilities in education sector data systems, with third-party platforms increasingly targeted as entry points.
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 Exploit Public-Facing Application (T1190) with high confidence (90%), supported by evidence indicating exploited a zero-day vulnerability in Oracle’s E-Business Suite and Supply Chain Compromise: Compromise Software Supply Chain (T1195.002) with moderate to high confidence (80%), supported by evidence indicating infiltrating a third-party service used by National Student Clearinghouse and TIAA. Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with moderate to high confidence (70%), supported by evidence indicating zero-day vulnerability in Oracle’s E-Business Suite allowed unauthorized access. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials in Files (T1552.006) with moderate confidence (60%), supported by evidence indicating third-party platforms increasingly targeted as entry points for data access. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating 3.89 million records stolen, including personal and financial information and Data from Network Shared Drive (T1039) with moderate to high confidence (80%), supported by evidence indicating 1.3 terabytes of archive files exposed (Harvard University). Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating data exfiltration confirmed in Cl0p attacks, 3.6 million records compromised and Transfer Data to Cloud Account (T1537) with moderate confidence (60%), supported by evidence indicating ransomware gangs increasingly target third-party platforms for data theft. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate to high confidence (70%), supported by evidence indicating ransomware attacks on educational institutions worldwide reached 251 incidents and Data Destruction (T1485) with moderate confidence (50%), supported by evidence indicating 624GB of data stolen (Cherokee County School District). Under the Defense Evasion tactic, the analysis identified Exploitation for Defense Evasion (T1211) with moderate to high confidence (80%), supported by evidence indicating exploited a zero-day vulnerability in Oracle’s E-Business Suite and Valid Accounts (T1078) with moderate to high confidence (70%), supported by evidence indicating third-party service providers targeted for initial access. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- TIAA Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/tiaa/incident/TIA1773398169
- TIAA CyberSecurity Rating page: https://www.rankiteo.com/company/tiaa
- TIAA Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/tia1773398169-tiaa-ransomware-january-2025/
- TIAA CyberSecurity Score History: https://www.rankiteo.com/company/tiaa/history
- TIAA CyberSecurity Incident Source: https://universitybusiness.com/ransomware-data-breaches-soar-in-the-u-s-affecting-k12-and-higher-ed-privacy/
- 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