Incident Score: Analysis & Impact (INS1778711150)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Instructure'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 Instructure 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 Instructure breach identified under incident ID INS1778711150.
The analysis begins with a detailed overview of Instructure's information like the linkedin page: https://www.linkedin.com/company/instructure-inc-, the number of followers: 79694, the industry type: E-Learning Providers and the number of employees: 2172 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 100 and after the incident was 100 with a difference of 0 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 Instructure and their customers.
On 11 May 2026, Instructure (Canvas) disclosed Data Breach, Ransomware issues under the banner "Instructure Strikes Deal with ShinyHunters to Secure 275 Million Stolen Student Records".
Instructure, the company behind the Canvas learning platform, reached an agreement with the hacking group ShinyHunters to prevent the leak of 275 million stolen student and teacher records.
The disruption is felt across the environment, affecting Canvas learning platform, Canvas Data 2, Canvas Beta, and exposing 3.65 terabytes, with nearly 275 million records at risk.
In response, moved swiftly to contain the threat with measures like Disabled vulnerable 'Free for Teacher' accounts, temporary shutdown of services, and began remediation that includes Addressed security flaws, returned stolen data, received proof of deletion, while recovery efforts such as Restored services, enhanced security measures continue, and stakeholders are being briefed through Public disclosure, CEO apology, assurances to affected institutions.
The case underscores how Ongoing, with advisories going out to stakeholders covering Assurances to affected institutions, CEO apology.
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 high confidence (90%), supported by evidence indicating exploited a vulnerability in Canvas’s Free for Teacher accounts. Under the Credential Access tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating gaining access to 3.65 terabytes of data via Free for Teacher accounts. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating 3.65 terabytes of data, including names, email addresses, student IDs and Data from Information Repositories (T1213) with moderate to high confidence (80%), supported by evidence indicating billions of private teacher-student messages compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating 275 million stolen student and teacher records, 3.65 TB data exfiltrated. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate confidence (50%), supported by evidence indicating ransom demand from hackers, threat to release data unless paid and Defacement: Internal Defacement (T1491.001) with high confidence (90%), supported by evidence indicating defaced login pages for 330 schools, displaying ransom notes. Under the Defense Evasion tactic, the analysis identified Valid Accounts: Default Accounts (T1078.001) with moderate to high confidence (70%), supported by evidence indicating exploited Free for Teacher accounts, disabled post-incident. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Instructure Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/instructure-inc-/incident/INS1778711150
- Instructure CyberSecurity Rating page: https://www.rankiteo.com/company/instructure-inc-
- Instructure Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/ins1778711150-instructure-ransomware-april-2026/
- Instructure CyberSecurity Score History: https://www.rankiteo.com/company/instructure-inc-/history
- Instructure CyberSecurity Incident Source: https://hackread.com/instructure-reaches-deal-with-shinyhunters-to-prevent-canvas-data-leak/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf