Mountain West Insurance Agency, LLC Breach Incident Score: Analysis & Impact (MOU1302913110825)

In this Rankiteo incident briefing, we review the Mountain West Insurance Agency, LLC breach identified under incident ID MOU1302913110825.

The analysis begins with a detailed overview of Mountain West Insurance Agency, LLC's information like the linkedin page: https://www.linkedin.com/company/mountain-west-insurance-agency-llc, the number of followers: 17, the industry type: Insurance and the number of employees: 3 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 755 and after the incident was 691 with a difference of -64 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 Mountain West Insurance Agency, LLC and their customers.

On 22 September 2025, Mountain West Insurance & Financial Services, LLC disclosed Data Breach (Unauthorized Access to Email Accounts) issues under the banner "Mountain West Insurance & Financial Services, LLC Data Breach".

Shamis & Gentile P.A., a class action law firm, is investigating a data breach at Mountain West Insurance & Financial Services, LLC.

The disruption is felt across the environment, affecting Employee Email Accounts, and exposing Full name, Social Security number and Date of birth.

In response, teams activated the incident response plan, while recovery efforts such as Notification letters mailed (2025-09-22) and Website notice published continue, and stakeholders are being briefed through Mail notifications to affected individuals, Website notice and Offer of free credit monitoring/identity protection services (if applicable).

The case underscores how Ongoing (as of 2025-09-22, notifications sent), and recommending next steps like Enroll in free credit monitoring/identity protection services if offered, Monitor financial accounts for suspicious activity and Place a fraud alert with credit bureaus, with advisories going out to stakeholders covering Mail notifications to affected individuals and Website notice.

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: Cloud Accounts (T1078.004) with high confidence (95%), with evidence including compromised Employee Email Accounts, and unauthorized actor gained access to multiple employee email accounts and Phishing: Spearphishing Link (T1566.002) with moderate to high confidence (70%), supported by evidence indicating entry point such as Employee Email Accounts (common vector for phishing). Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with moderate to high confidence (85%), supported by evidence indicating financial account access information exposed via email compromise and Steal Web Session Cookie (T1539) with moderate to high confidence (75%), supported by evidence indicating payment card access information suggests session/cookie theft potential. Under the Collection tactic, the analysis identified Email Collection: Remote Email Collection (T1114.002) with high confidence (95%), with evidence including unauthorized actor gained access to multiple employee email accounts, and data exfiltration such as Likely. Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol: Exfiltration Over Asymmetric Encrypted Non-C2 Protocol (T1048.002) with moderate to high confidence (80%), with evidence including data exfiltration such as Likely (data compromised in cyberattack), and sensitive PII/financial data exposed and Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with moderate to high confidence (75%), supported by evidence indicating email accounts as exfiltration vector (common for unencrypted data transmission). Under the Impact tactic, the analysis identified Impair Defenses: Disable or Modify Cloud Firewall (T1598.003) with moderate confidence (60%), supported by evidence indicating prolonged access (March–August 2025) suggests possible defense impairment and Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no direct evidence, but high-risk data exposure implies potential destructive intent. Under the Persistence tactic, the analysis identified Account Manipulation: Additional Cloud Roles (T1098.003) with moderate to high confidence (70%), supported by evidence indicating prolonged access (5 months) suggests potential persistence mechanisms in cloud email accounts. Under the Defense Evasion tactic, the analysis identified Hide Artifacts: Email Hiding Rules (T1564.008) with moderate to high confidence (80%), supported by evidence indicating undetected for 5 months implies possible email rule manipulation to hide activity. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.