Incident Score: Analysis & Impact (XFI1781555164)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Xfinity's Cyber Attack 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 Xfinity 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 Xfinity breach identified under incident ID XFI1781555164.
The analysis begins with a detailed overview of Xfinity's information like the linkedin page: https://www.linkedin.com/company/xfinity, the number of followers: 7275, the industry type: Telecommunications and the number of employees: 3517 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 762 and after the incident was 703 with a difference of -59 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 Xfinity and their customers.
Comcast Xfinity recently reported "Comcast Xfinity Data Breach via Citrix Vulnerability", a noteworthy cybersecurity incident.
Attackers exploited a Citrix software vulnerability in October 2023, compromising data belonging to approximately 35 million current and former Xfinity customers.
The disruption is felt across the environment, affecting Xfinity systems, and exposing Customer data, with nearly 35 million records at risk, plus an estimated financial loss of $117.5 million (settlement amount).
In response, and stakeholders are being briefed through Public disclosure in December 2023, settlement notifications.
The case underscores how Ongoing (settlement pending final approval), with advisories going out to stakeholders covering Breach notifications sent to affected customers; settlement claims open until September 14, 2026.
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 attackers exploited a Citrix software vulnerability in October 2023. Under the Credential Access tactic, the analysis identified Exploitation for Credential Access (T1212) with moderate to high confidence (70%), supported by evidence indicating exploitation of Citrix software vulnerability likely enabled credential access. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating personally Identifiable Information (PII) of 35 million customers compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating data breach impacting 35 million current and former customers. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no details on data destruction, but breach involved PII exposure and Data Manipulation: Transmitted Data Manipulation (T1565.002) with lower confidence (40%), supported by evidence indicating potential for data manipulation during exfiltration (implied by PII exposure). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Xfinity Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/xfinity/incident/XFI1781555164
- Xfinity CyberSecurity Rating page: https://www.rankiteo.com/company/xfinity
- Xfinity Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/xfi1781555164-comcast-cyber-attack-december-2023/
- Xfinity CyberSecurity Score History: https://www.rankiteo.com/company/xfinity/history
- Xfinity CyberSecurity Incident Source: https://www.techtimes.com/articles/318432/20260615/xfinity-store-opens-machesney-park-comcast-breach-claim-deadline-looms.htm
- 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