Incident Score: Analysis & Impact (AFL1768391547)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Aflac'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 Aflac 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 Aflac breach identified under incident ID AFL1768391547.
The analysis begins with a detailed overview of Aflac's information like the linkedin page: https://www.linkedin.com/company/aflac, the number of followers: 168536, the industry type: Insurance and the number of employees: 18043 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 579 and after the incident was 491 with a difference of -88 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 Aflac and their customers.
On 12 June 2025, Aflac disclosed Data Breach issues under the banner "Aflac Cyberattack and Data Breach".
Aflac, a Fortune 500 insurance giant specializing in supplemental health insurance, experienced a cyberattack in June 2025 that compromised the personal and protected health information of approximately 22.65 million individuals.
The disruption is felt across the environment, affecting Multiple Aflac systems, and exposing Names, addresses, dates of birth, government-issued ID numbers (passport, state ID, driver’s license), Social Security numbers, medical information, health insurance information, with nearly 22,650,000 records at risk.
In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Intrusion contained within hours, and stakeholders are being briefed through Press releases, notification letters to affected individuals, SEC filing.
The case underscores how Ongoing, with advisories going out to stakeholders covering Senators Bill Cassidy and Margaret Wood Hassan requested further information about the incident on August 28, 2025, with a deadline of September 5, 2025.
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 Phishing (T1566) with high confidence (90%), supported by evidence indicating threat actor gained access to multiple systems through social engineering attacks, Phishing: Spearphishing Link (T1566.002) with moderate to high confidence (80%), supported by evidence indicating social engineering campaigns against IT help desks and managed service providers, and Valid Accounts (T1078) with high confidence (90%), supported by evidence indicating access to multiple systems through social engineering attacks on user accounts. Under the Credential Access tactic, the analysis identified Brute Force (T1110) with moderate confidence (60%), supported by evidence indicating social engineering attacks on user accounts (implied credential compromise) and Modify Authentication Process (T1556) with moderate confidence (50%), supported by evidence indicating potential lack of robust multi-factor authentication. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating names, addresses, dates of birth, government-issued IDs, medical information compromised and Data from Information Repositories (T1213) with moderate to high confidence (80%), supported by evidence indicating health insurance details and medical information accessed. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating data breach affecting 22.65 million individuals; data exfiltration confirmed and Transfer Data to Cloud Account (T1537) with moderate confidence (60%), supported by evidence indicating scattered Spider known for data theft and extortion. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with lower confidence (20%), supported by evidence indicating no ransomware deployed in this attack and Financial Theft (T1657) with moderate to high confidence (70%), supported by evidence indicating financially motivated hacking group; data theft and extortion. Under the Defense Evasion tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating access through social engineering on user accounts (abuse of legitimate access) and Hide Artifacts (T1564) with moderate confidence (50%), supported by evidence indicating intrusion contained within hours (implied evasion during 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
- Aflac Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/aflac/incident/AFL1768391547
- Aflac CyberSecurity Rating page: https://www.rankiteo.com/company/aflac
- Aflac Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/afl1768391547-aflac-breach-december-2025/
- Aflac CyberSecurity Score History: https://www.rankiteo.com/company/aflac/history
- Aflac CyberSecurity Incident Source: https://www.hipaajournal.com/aflac-data-breach/
- 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