Incident Score: Analysis & Impact (CRUTEL1774239823)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of TELUS'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 TELUS 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 TELUS breach identified under incident ID CRUTEL1774239823.
The analysis begins with a detailed overview of TELUS's information like the linkedin page: https://www.linkedin.com/company/telus, the number of followers: 408716, the industry type: Telecommunications and the number of employees: 37132 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 666 and after the incident was 612 with a difference of -54 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 TELUS and their customers.
On 12 March 2026, Crunchyroll disclosed Data Breach issues under the banner "Crunchyroll Suffers Major Data Breach: 100 GB of PII Exfiltrated".
A threat actor claims to have stolen approximately 100 GB of personally identifiable information (PII) from Crunchyroll, the Sony-owned anime streaming platform, following a breach on March 12, 2026.
The disruption is felt across the environment, affecting Ticketing systems and Internal systems, and exposing 100 GB of PII.
Formal response steps have not been shared publicly yet.
Overall, the incident is a reminder of why proactive monitoring and strong governance matter.
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 high confidence (90%), supported by evidence indicating attack reportedly originated from a compromised employee account at Telus and Trusted Relationship (T1199) with moderate to high confidence (80%), supported by evidence indicating outsourcing partner (Telus) provided the attacker with initial access. Under the Lateral Movement tactic, the analysis identified Exploitation of Remote Services (T1210) with moderate to high confidence (70%), supported by evidence indicating once inside, the threat actor conducted lateral movement and Remote Services (T1021) with moderate to high confidence (70%), supported by evidence indicating infiltrating sensitive customer-facing infrastructure, including ticketing systems. Under the Credential Access tactic, the analysis identified Valid Accounts (T1078) with high confidence (90%), supported by evidence indicating compromised employee account at Telus provided initial access. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating 100 GB of personally identifiable information (PII) exfiltrated and Data from Information Repositories (T1213) with moderate to high confidence (70%), supported by evidence indicating infiltrating sensitive customer-facing infrastructure, including ticketing systems. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), with evidence including 100 GB of PII exfiltrated, and data exfiltration such as Yes. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating full scope and impact of the incident unclear and Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating pII exfiltrated, potential exposure of user details. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- TELUS Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/telus/incident/CRUTEL1774239823
- TELUS CyberSecurity Rating page: https://www.rankiteo.com/company/telus
- TELUS Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/crutel1774239823-crunchyroll-telus-breach-march-2026/
- TELUS CyberSecurity Score History: https://www.rankiteo.com/company/telus/history
- TELUS CyberSecurity Incident Source: https://www.linkedin.com/feed/update/urn:li:activity:7441691585588912128
- 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