Ericsson Breach Incident Score: Analysis & Impact (ERI1773189089)

In this Rankiteo incident briefing, we review the Ericsson breach identified under incident ID ERI1773189089.

The analysis begins with a detailed overview of Ericsson's information like the linkedin page: https://www.linkedin.com/company/ericsson, the number of followers: 2260541, the industry type: Telecommunications and the number of employees: 107243 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 620 and after the incident was 565 with a difference of -55 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 Ericsson and their customers.

On 28 April 2025, Ericsson disclosed Data Breach issues under the banner "Ericsson Vendor Breach Exposes Personal Data of Over 15,000 Individuals".

Ericsson disclosed a security incident involving a third-party vendor, which detected a suspicious event potentially linked to unauthorized access to data on its systems.

The disruption is felt across the environment, affecting Vendor systems, and exposing Personal information of over 15,000 individuals, with nearly 15,000+ records at risk.

In response, teams activated the incident response plan, and began remediation that includes Enhanced security measures, and stakeholders are being briefed through Regulatory notifications and public disclosure.

The case underscores how Concluded, teams are taking away lessons such as The incident underscores the growing threat to telecom providers and the need for robust vendor security protocols in high-risk sectors, and recommending next steps like Implement stronger vendor security protocols and continuous monitoring of third-party systems.

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.

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 Supply Chain Compromise (T1195) with high confidence (90%), supported by evidence indicating breach did not affect Ericsson’s internal infrastructure but occurred at a vendor and Compromise Software Supply Chain (T1195.002) with moderate to high confidence (80%), supported by evidence indicating third-party vendor handling sensitive information was compromised. Under the Credential Access tactic, the analysis identified Steal Application Access Token (T1528) with moderate confidence (60%), supported by evidence indicating unauthorized access to data on its systems (vendor). Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating personal information of over 15,000 individuals was exposed. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating unauthorized party may have accessed a limited set of files. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no evidence of data misuse reported and Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating suspicious event potentially linked to unauthorized access. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.