Ericsson Breach Incident Score: Analysis & Impact (ERI1773160822)

In this Rankiteo incident briefing, we review the Ericsson breach identified under incident ID ERI1773160822.

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 808 and after the incident was 761 with a difference of -47 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.

Ericsson recently reported "Ericsson Major Data Breach Impacting Employees and Customers", a noteworthy cybersecurity incident.

Swedish telecommunications giant Ericsson has confirmed a cyber incident in April 2025 that may have compromised sensitive personal and financial data belonging to employees and customers.

The disruption is felt across the environment, and exposing Sensitive personal and financial data.

In response, teams activated the incident response plan, and began remediation that includes Enhancing cybersecurity protocols, and stakeholders are being briefed through Formal notification to the California Attorney General’s office.

The case underscores how Ongoing, with advisories going out to stakeholders covering Offering free identity protection services through IDX, including credit and dark web monitoring, identity theft recovery support, and up to $1 million in identity fraud reimbursement. Eligible individuals have until June 9, 2026, to register.

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 Trusted Relationship (T1199) with moderate confidence (60%), supported by evidence indicating state-sponsored threat actor targeting large corporations and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating no details on attack vector; public-facing systems likely. Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate to high confidence (70%), supported by evidence indicating social Security numbers, driver’s license details compromised and Modify Authentication Process (T1556) with moderate confidence (50%), supported by evidence indicating state-sponsored actor may have manipulated auth processes. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating names, addresses, phone numbers, credit card info exposed and Data from Information Repositories (T1213) with moderate to high confidence (70%), supported by evidence indicating medical data and financial data compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating state-sponsored actor likely used C2 for data exfiltration and Exfiltration Over Web Service (T1567) with moderate confidence (60%), supported by evidence indicating large-scale data breach suggests web-based exfiltration. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (40%), supported by evidence indicating no evidence of destruction, but state-sponsored motive and Stored Data Manipulation (T1565.001) with moderate confidence (50%), supported by evidence indicating espionage motivation may include data manipulation. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.