Sentry Advisors Breach Incident Score: Analysis & Impact (SEN1766181476)

In this Rankiteo incident briefing, we review the Sentry Advisors breach identified under incident ID SEN1766181476.

The analysis begins with a detailed overview of Sentry Advisors's information like the linkedin page: https://www.linkedin.com/company/sentryadvisors, the number of followers: 632, the industry type: Financial Services and the number of employees: 27 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 753 and after the incident was 682 with a difference of -71 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 Sentry Advisors and their customers.

On 18 December 2025, Sentry Advisors, LLC disclosed Data Breach issues under the banner "Sentry Advisors, LLC Data Breach".

Sentry Advisors, LLC, a regulatory risk consulting firm serving financial institutions, reported a data breach affecting individuals in Massachusetts.

The disruption is felt across the environment, and exposing Sensitive personal information, including social security numbers, names, addresses, and phone numbers.

In response, and stakeholders are being briefed through Notification to affected individuals, call center setup.

The case underscores how and recommending next steps like Sign up for complimentary identity theft protection services, Monitor credit reports and financial accounts for unusual activity and Be alert for phishing emails or phone calls, with advisories going out to stakeholders covering Call center setup at 1-800-405-6108 (Monday through Friday, 8 a.m. to 8 p.m. ET).

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 breach exposed sensitive PII; unclear if unauthorized access occurred and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating attack vector unspecified; financial services firm may have exposed systems. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with moderate confidence (60%), supported by evidence indicating sSNs and PII exposed; may indicate improper storage or access. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating high-sensitivity PII (SSNs, names, addresses) compromised; implies exfiltration and Automated Exfiltration (T1020) with moderate confidence (60%), supported by evidence indicating large-scale PII exposure suggests automated data transfer. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with lower confidence (40%), supported by evidence indicating no ransomware details; but high-impact breach may involve encryption and Data Manipulation: Stored Data Manipulation (T1565.001) with moderate confidence (50%), supported by evidence indicating pII exposure may enable identity theft or fraud. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.