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Analyze » Suncoast Credit Union » SUN1764888584

Incident Score: Analysis & Impact (SUN1764888584)

The details regarding individual company incidents & reports gives you full view from every side.

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-117
Company Score Before Incident760 / 1000
Company Score After Incident643 / 1000
Company LinkView Suncoast Credit Union Profile
INCIDENT NUMBERSUN1764888584
Type of Cyber IncidentRansomware
ATTACK VECTORThird-Party Vendor Compromise
DATA EXPOSEDSensitive personally identifiable information
INCIDENT DATE13/08/2025
STATUSOngoing

Key Highlights From The Incident Analysis

  • Timeline of Suncoast Credit Union's Ransomware 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 Suncoast Credit Union 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 Suncoast Credit Union breach identified under incident ID SUN1764888584.

The analysis begins with a detailed overview of Suncoast Credit Union's information like the linkedin page: https://www.linkedin.com/company/suncoastcreditunion, the number of followers: 20252, the industry type: Banking and the number of employees: 1623 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 760 and after the incident was 643 with a difference of -117 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 Suncoast Credit Union and their customers.

On 14 August 2025, Suncoast Credit Union disclosed Data Breach issues under the banner "Suncoast Credit Union Data Breach via Third-Party Vendor (Marquis Software Solutions)".

Suncoast Credit Union was impacted by a data breach involving Marquis Software Solutions, a third-party marketing and communications vendor.

The disruption is felt across the environment, affecting Marquis Software Solutions' network (third-party vendor), and exposing Sensitive personally identifiable information.

Formal response steps have not been shared publicly yet.

The case underscores how Ongoing.

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 Supply Chain Compromise (T1195) with high confidence (95%), supported by evidence indicating data breach involving Marquis Software Solutions, a third-party marketing and communications vendor and Supply Chain Compromise: Compromise Software Supply Chain (T1195.002) with high confidence (90%), supported by evidence indicating marquis detected suspicious activity on its network... later determined to be a ransomware attack. Under the Execution tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate to high confidence (80%), supported by evidence indicating later determined it was the victim of a ransomware attack. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating ransomware attack... incident was limited to Marquis’ environment and Data Manipulation: Transmitted Data Manipulation (T1565.002) with moderate to high confidence (70%), supported by evidence indicating sensitive personally identifiable information may have been exposed. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating sensitive personally identifiable information may have been exposed. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Sources & References