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Analyze » Gesa Credit Union » GES1764878550

Incident Score: Analysis & Impact (GES1764878550)

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

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-69
Company Score Before Incident758 / 1000
Company Score After Incident689 / 1000
Company LinkView Gesa Credit Union Profile
INCIDENT NUMBERGES1764878550
Type of Cyber IncidentBreach
ATTACK VECTORThird-party vendor compromise
DATA EXPOSEDSensitive personally identifiable information
INCIDENT DATE13/08/2025
STATUSOngoing

Key Highlights From The Incident Analysis

  • Timeline of Gesa Credit Union's Breach 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 Gesa 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 Gesa Credit Union breach identified under incident ID GES1764878550.

The analysis begins with a detailed overview of Gesa Credit Union's information like the linkedin page: https://www.linkedin.com/company/gesa-credit-union, the number of followers: 7304, the industry type: Financial Services and the number of employees: 761 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 758 and after the incident was 689 with a difference of -69 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 Gesa Credit Union and their customers.

On 14 August 2025, Gesa Credit Union disclosed Data Breach issues under the banner "Gesa Credit Union Data Breach via Marquis Software Solutions".

Gesa Credit Union learned of a data security incident involving Marquis Software Solutions, a former marketing and communications vendor.

The disruption is felt across the environment, and exposing Sensitive personally identifiable information.

Formal response steps have not been shared publicly yet.

The case underscores how Ongoing, with advisories going out to stakeholders covering Affected individuals may be eligible for compensation.

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 (90%), supported by evidence indicating data security incident involving Marquis Software Solutions, a former marketing and communications vendor and Supply Chain Compromise: Compromise Software Supply Chain (T1195.002) with moderate to high confidence (80%), supported by evidence indicating unauthorized third party had accessed and acquired certain files from its Marquis systems. Under the Exfiltration tactic, the analysis identified Transfer Data to Cloud Account (T1537) with moderate to high confidence (70%), supported by evidence indicating unauthorized third party had accessed and acquired certain files and Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating data exfiltration such as Yes. Under the Credential Access tactic, the analysis identified Steal Application Access Token (T1528) with moderate confidence (60%), supported by evidence indicating vendor compromise; sensitive personally identifiable information exposed. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate confidence (50%), supported by evidence indicating high identity theft risk; personally identifiable information compromised. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Sources & References