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Analyze » Sumner County Schools » SUM1784687076

Incident Score: Analysis & Impact (SUM1784687076)

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

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-36
Company Score Before Incident845 / 1000
Company Score After Incident809 / 1000
Company LinkView Sumner County Schools Profile
INCIDENT NUMBERSUM1784687076
Type of Cyber IncidentBreach
ATTACK VECTORNA
DATA EXPOSEDNA
INCIDENT DATE19/07/2026
STATUSOngoing

Key Highlights From The Incident Analysis

  • Timeline of Sumner County Schools'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 Sumner County Schools 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 Sumner County Schools breach identified under incident ID SUM1784687076.

The analysis begins with a detailed overview of Sumner County Schools's information like the linkedin page: https://www.linkedin.com/company/sumner-county-schools, the number of followers: 0, the industry type: Education Administration Programs and the number of employees: 1842 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 845 and after the incident was 809 with a difference of -36 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 Sumner County Schools and their customers.

On 01 August 2023, Sumner County Schools disclosed Security Breach issues under the banner "Sumner County Schools Cybersecurity Breach".

Sumner County Schools in Tennessee postponed its first day of classes after detecting a security breach in its network.

The disruption is felt across the environment, affecting School district network.

In response, and stakeholders are being briefed through Parents will receive an official update from the superintendent regarding the revised calendar.

The case underscores how Ongoing, with advisories going out to stakeholders covering Parents will receive an official update from the superintendent regarding the revised calendar.

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 Exploit Public-Facing Application (T1190) with moderate confidence (50%), with evidence including security breach in its network, and disrupted the district’s schedule and Valid Accounts (T1078) with moderate confidence (60%), with evidence including unauthorized access remain limited, and breach was discovered on Monday. Under the Impact tactic, the analysis identified Service Stop (T1489) with moderate to high confidence (80%), with evidence including postponed its first day of classes, and delaying some events by a week and Defacement (T1491) with lower confidence (30%), supported by evidence indicating disrupted the district’s schedule. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with lower confidence (40%), with evidence including security breach in its network, and involving the FBI and DHS. Under the Defense Evasion tactic, the analysis identified Disabling Security Tools (T1089) with moderate confidence (50%), with evidence including breach was discovered on Monday, and details of the unauthorized access remain limited. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Initial Access
Exploit Public-Facing Application (50%)
Valid Accounts (60%)
Impact
Service Stop (80%)
Defacement (30%)
Exfiltration
Exfiltration Over C2 Channel (40%)
Defense Evasion
Disabling Security Tools (50%)

Sources & References