AmeriCU Mortgage Breach Incident Score: Analysis & Impact (AME1192511111525)

In this Rankiteo incident briefing, we review the AmeriCU Mortgage breach identified under incident ID AME1192511111525.

The analysis begins with a detailed overview of AmeriCU Mortgage's information like the linkedin page: https://www.linkedin.com/company/americu-mortgage, the number of followers: 372, the industry type: Financial Services and the number of employees: 49 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 630 with a difference of -125 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 AmeriCU Mortgage and their customers.

On 14 November 2025, Towne Mortgage Company disclosed ransomware and data breach issues under the banner "Towne Mortgage Company Ransomware Attack and Data Breach".

Full-service mortgage lender Towne Mortgage Company disclosed a major data breach following a ransomware attack by the BlackByte group.

The disruption is felt across the environment, and exposing True.

In response, teams activated the incident response plan, and began remediation that includes forensic investigation and manual review of compromised data, while recovery efforts such as notification to affected individuals, 24-month credit monitoring (Cyberscout) and single bureau credit reports continue, and stakeholders are being briefed through notification letters to affected individuals, public disclosure to Massachusetts Attorney General and advisories on credit monitoring enrollment (90-day window).

The case underscores how completed (forensic investigation and manual review conducted), with advisories going out to stakeholders covering credit monitoring enrollment (within 90 days), fraud alert/security freeze guidance and regular review of financial statements and credit reports.

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 unauthorized access to the company’s network was detected on June 7, 2025 and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating ransomware attack by the BlackByte group (common TTP for BlackByte). Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol (T1048) with high confidence (95%), with evidence including customer data files were copied from its systems, and sample stolen data published on its dark web portal on July 30, 2025 and Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with moderate to high confidence (80%), supported by evidence indicating data exfiltration confirmed by forensic investigation. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (95%), with evidence including ransomware attack, and data encryption such as true and Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating ransomware attack (possible but not explicitly confirmed). Under the Lateral Movement tactic, the analysis identified Remote Services (T1021) with moderate confidence (60%), supported by evidence indicating unauthorized access to the company’s network (implies internal movement). Under the Defense Evasion tactic, the analysis identified File Deletion: Delete or Alter Stored Data (T1070.004) with moderate to high confidence (70%), supported by evidence indicating ransomware (commonly deletes backups/shadow copies) and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating ransomware (often disables security software). Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate confidence (50%), supported by evidence indicating blackByte ransomware group (known to use credential dumping). Under the Command and Control tactic, the analysis identified Application Layer Protocol (T1071) with moderate to high confidence (80%), supported by evidence indicating data exfiltration such as true (likely via C2 channels). Under the Persistence tactic, the analysis identified Account Manipulation (T1098) with moderate confidence (50%), supported by evidence indicating unauthorized access (possible account manipulation for persistence). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.