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Analyze » Appalachian Community Federal Credit Union » APP1767212013

Incident Score: Analysis & Impact (APP1767212013)

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

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-125
Company Score Before Incident754 / 1000
Company Score After Incident629 / 1000
Company LinkView Appalachian Community Federal Credit Union Profile
INCIDENT NUMBERAPP1767212013
Type of Cyber IncidentRansomware
ATTACK VECTORNA
DATA EXPOSED75 GB of data
INCIDENT DATE06/10/2025
STATUSOngoing

Key Highlights From The Incident Analysis

  • Timeline of Appalachian Community Federal 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 Appalachian Community Federal 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 Appalachian Community Federal Credit Union breach identified under incident ID APP1767212013.

The analysis begins with a detailed overview of Appalachian Community Federal Credit Union's information like the linkedin page: https://www.linkedin.com/company/appalachian-community-federal-credit-union, the number of followers: 557, the industry type: Financial Services and the number of employees: 50 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 754 and after the incident was 629 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 Appalachian Community Federal Credit Union and their customers.

On 01 December 2025, Appalachian Community Federal Credit Union disclosed Ransomware Attack issues under the banner "Appalachian Community Federal Credit Union Data Breach".

Appalachian Community Federal Credit Union (ACFCU) experienced a ransomware attack by the group known as Qilin, resulting in the exposure of sensitive personally identifiable information of its members.

The disruption is felt across the environment, affecting Computer systems and network, and exposing 75 GB of data.

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Network taken offline, and stakeholders are being briefed through Notification letters to affected individuals.

The case underscores how Ongoing, and recommending next steps like Enroll in free credit monitoring and fraud assistance services, Monitor credit reports and account statements and Place a fraud alert or security freeze on credit files, with advisories going out to stakeholders covering Notification letters sent to affected individuals with instructions for credit monitoring and fraud assistance.

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 Valid Accounts (T1078) with moderate to high confidence (70%), with evidence including ransomware attack attributed to Qilin group, and no specific vulnerability exploited mentioned and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating attack vector not specified, but ransomware often exploits public-facing apps. Under the Credential Access tactic, the analysis identified Brute Force (T1110) with moderate confidence (60%), supported by evidence indicating ransomware groups often use brute force to gain initial access and Unsecured Credentials (T1552) with moderate confidence (60%), supported by evidence indicating no evidence of specific credential theft, but implied in ransomware attacks. Under the Lateral Movement tactic, the analysis identified Remote Services (T1021) with moderate to high confidence (70%), supported by evidence indicating ransomware groups typically move laterally after initial access. Under the Exfiltration tactic, the analysis identified Transfer Data to Cloud Account (T1537) with lower confidence (40%), supported by evidence indicating 75 GB of data published on the dark web and Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating data exfiltration confirmed, 75 GB published on dark web. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate to high confidence (80%), supported by evidence indicating ransomware attack by Qilin group and Data Destruction (T1485) with moderate confidence (50%), supported by evidence indicating ransomware often involves data destruction or encryption. Under the Defense Evasion tactic, the analysis identified Indicator Removal (T1070) with moderate confidence (60%), supported by evidence indicating ransomware groups often remove indicators post-compromise and Impair Defenses (T1562) with moderate to high confidence (70%), supported by evidence indicating network taken offline, suggesting defense impairment. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Initial Access
Valid Accounts (70%)
Exploit Public-Facing Application (50%)
Credential Access
Brute Force (60%)
Unsecured Credentials (60%)
Lateral Movement
Remote Services (70%)
Exfiltration
Transfer Data to Cloud Account (40%)
Exfiltration Over C2 Channel (90%)
Impact
Data Encrypted for Impact (80%)
Data Destruction (50%)
Defense Evasion
Indicator Removal (60%)
Impair Defenses (70%)

Sources & References