Marquis Breach Incident Score: Analysis & Impact (MAR4893548111825)

In this Rankiteo incident briefing, we review the Marquis breach identified under incident ID MAR4893548111825.

The analysis begins with a detailed overview of Marquis's information like the linkedin page: https://www.linkedin.com/company/marquis-software-solutions, the number of followers: 2981, the industry type: Financial Services and the number of employees: 314 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 756 and after the incident was 598 with a difference of -158 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 Marquis and their customers.

On 27 October 2025, Marquis Software Solutions disclosed ransomware and data breach issues under the banner "Marquis Software Solutions Ransomware and Data Breach (2025)".

On Aug.

The disruption is felt across the environment, and exposing personally identifiable information (PII) and member account data, with nearly 6,876 records at risk.

In response, teams activated the incident response plan, and began remediation that includes strengthened security measures, and stakeholders are being briefed through notifications to affected financial institutions, member breach notices and Iowa Attorney General notification (2025-11-07).

The case underscores how ongoing (as of 2025-11-07), and recommending next steps like Monitor credit reports and financial accounts for suspicious activity, Enroll in the complimentary Epiq Privacy Solutions ID services (credit monitoring, dark web monitoring, identity restoration) and Consider placing a fraud alert or credit freeze with major credit bureaus, with advisories going out to stakeholders covering Notified affected financial institutions and Provided identity protection services to impacted members.

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 Exploit Public-Facing Application (T1190) with moderate confidence (60%), supported by evidence indicating technology vendor serving banks and credit unions detected suspicious network activity (no explicit vector) and Valid Accounts (T1078) with moderate confidence (50%), supported by evidence indicating third-party vendor security vulnerabilities (implied but not confirmed). Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with moderate to high confidence (70%), supported by evidence indicating ransomware attack implies malicious payload execution. Under the Persistence tactic, the analysis identified Valid Accounts: Local Accounts (T1078.003) with moderate confidence (50%), supported by evidence indicating suspicious network activity (possible lateral movement). Under the Privilege Escalation tactic, the analysis identified Valid Accounts: Default Accounts (T1078.001) with lower confidence (40%), supported by evidence indicating high (potential loss of trust among financial institution clients) (implies admin-level access). Under the Defense Evasion tactic, the analysis identified Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (80%), supported by evidence indicating data exfiltration + data encryption (typical ransomware cleanup) and Impair Defenses: Disable/Modify Tools (T1562.001) with moderate to high confidence (70%), supported by evidence indicating ransomware attack (commonly disables AV/EDR). Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate to high confidence (70%), supported by evidence indicating sensitive member account information exposed (implies credential harvesting). Under the Discovery tactic, the analysis identified File and Directory Discovery (T1083) with moderate to high confidence (80%), supported by evidence indicating member account data dating prior to 2020 (targeted discovery) and System Information Discovery (T1082) with moderate confidence (60%), supported by evidence indicating high value targets such as member account data (pre-2020). Under the Lateral Movement tactic, the analysis identified Remote Services: Remote Desktop Protocol (T1021.001) with moderate confidence (50%), supported by evidence indicating technology vendor serving hundreds of banks (implies network traversal). Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating pII (name, DOB, account numbers, SSN/Tax ID) exfiltrated. Under the Command and Control tactic, the analysis identified Application Layer Protocol: Web Protocols (T1071.001) with moderate to high confidence (80%), supported by evidence indicating data was exposed on the black market (implies C2 exfiltration). Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with high confidence (90%), supported by evidence indicating data exfiltration + data exposed on the black market. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (100%), supported by evidence indicating ransomware attack + data encryption and Data Destruction (T1485) with moderate to high confidence (70%), supported by evidence indicating data was exposed on the black market despite ransom payment (partial destruction). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.