Incident Score: Analysis & Impact (SUN1791477083)
The details regarding individual company incidents & reports gives you full view from every side.
Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Sungrow's Vulnerability 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 Sungrow 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 Sungrow breach identified under incident ID SUN1791477083.
The analysis begins with a detailed overview of Sungrow's information like the linkedin page: https://www.linkedin.com/company/sungrow, the number of followers: 656616, the industry type: Renewable Energy Equipment Manufacturing and the number of employees: 2404 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 768 and after the incident was 773 with a difference of 5 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 Sungrow and their customers.
Sungrow recently reported "Critical Sungrow Inverter Vulnerability Exposed Cloud Solar Management Platform", a noteworthy cybersecurity incident.
A severe security flaw in Sungrow’s iSolarCloud platform, a cloud-based system for managing solar plants, inverters, and battery storage, could have allowed attackers to bypass password authentication entirely.
The disruption is felt across the environment, affecting Sungrow iSolarCloud platform, connected solar inverters, battery storage systems, and exposing Solar plant configurations, user account data, admin privileges.
In response, moved swiftly to contain the threat with measures like Hotfix issued within 24 hours, and began remediation that includes Patch applied to fix business-logic error in login process, and stakeholders are being briefed through Limited public disclosure (no CVE, affected firmware list, or patch version details).
The case underscores how Resolved (hotfix applied), teams are taking away lessons such as Need for enhanced cloud security in critical energy infrastructure, importance of securing API authentication mechanisms, risks of internet-exposed solar management systems, and recommending next steps like Avoid direct public exposure of inverter dashboards and management interfaces, Implement multi-factor authentication (MFA) for cloud-based energy management platforms and Conduct regular security audits of business-logic processes in APIs.
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%), with evidence including severe security flaw in Sungrow’s iSolarCloud platform, and business-logic error in the login process and Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating bypass password authentication entirely...with just a valid email address. Under the Credential Access tactic, the analysis identified Modify Authentication Process (T1556) with high confidence (90%), supported by evidence indicating login_type field in iSolarCloud’s API could be manipulated to authenticate requests without requiring a password and Brute Force: Password Guessing (T1110.001) with moderate to high confidence (70%), supported by evidence indicating valid email address...enabled unauthorized access to user accounts. Under the Privilege Escalation tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating escalate privileges via compromised admin accounts. Under the Defense Evasion tactic, the analysis identified Use Alternate Authentication Material: Pass the Hash (T1550.002) with moderate to high confidence (70%), supported by evidence indicating encrypted REST API requests and request signatures failed to prevent this bypass and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating lack of login alerts for this method heightened the risk. Under the Persistence tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating exploit account-recovery features to maintain persistent control. Under the Impact tactic, the analysis identified Manipulation of Control (T0880) with high confidence (90%), supported by evidence indicating access and modify solar plant configurations, start or stop inverters and battery systems, Damage to Property (T0829) with moderate to high confidence (70%), supported by evidence indicating disrupt solar power generation through mass shutdowns, and Loss of Control (T0881) with moderate to high confidence (80%), supported by evidence indicating alter device behavior via malicious firmware updates. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Sungrow Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/sungrow/incident/SUN1791477083
- Sungrow CyberSecurity Rating page: https://www.rankiteo.com/company/sungrow
- Sungrow Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/sun1791477083-sungrow-vulnerability-june-2025/
- Sungrow CyberSecurity Score History: https://www.rankiteo.com/company/sungrow/history
- Sungrow CyberSecurity Incident Source: https://cybersecuritynews.com/sungrow-inverter-vulnerability/
- 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