Full Report
SonicWall has formally implicated state-sponsored threat actors as behind the September security breach that led to the unauthorized exposure of firewall configuration backup files. "The malicious activity – carried out by a state-sponsored threat actor - was isolated to the unauthorized access of cloud backup files from a specific cloud environment using an API call," the company said in a
Analysis Summary
# Threat Actor: State-Sponsored Threat Actor (Unspecified)
## Attribution & Identity
* **Identification:** Formally implicated as a "state-sponsored threat actor" by SonicWall.
* **Known Aliases/Associated Groups:** None specified in the provided context. The activity is explicitly distinguished from the ongoing Akira ransomware attacks.
## Activity Summary
* **Recent Campaigns and Operations:** Responsible for a security breach targeting SonicWall in September (2025), which resulted in the unauthorized exposure of firewall configuration backup files.
* **Scope:** The malicious activity was isolated to accessing cloud backup files from a specific cloud environment. SonicWall claimed that less than 5% of its customers were impacted concerning the backup files stored in the cloud.
## Tactics, Techniques & Procedures
* **Specific TTPs Mentioned:**
* Unauthorized access to cloud backup files.
* Utilized an **API call** to perform the unauthorized access.
* **MITRE ATT&CK IDs:** Not explicitly mentioned in the text.
## Targeting
* **Sectors:** Organizations utilizing SonicWall's cloud backup service, highly relevant to **SMB (Small to Medium Businesses)** and distributed environments that rely on edge security providers.
* **Geography:** Not explicitly detailed, but nation-state actors targeting edge security providers often have broad geopolitical interests.
* **Victims:** Customers of SonicWall who used the cloud backup service whose configuration files were compromised. (No specific customer names provided).
## Tools & Infrastructure
* **Malware Families Used:** Not mentioned.
* **Infrastructure (C2, Domains, IPs):** Access method specified as an **API call** to the cloud environment hosting the backups. No specific IP addresses or domains were disclosed.
## Implications
* **Strategic Implications:** This incident highlights a clear trend of nation-state-backed threat actors specifically targeting **edge security providers** (like SonicWall) to potentially gain broader insight into network configurations of downstream clients, especially SMBs.
* **Threat Assessment:** The threat actor demonstrated capability in exploiting cloud storage access mechanisms (API calls) pertinent to a third-party vendor's infrastructure, implying resource prioritization toward intelligence gathering from critical security technology supply chains.
## Mitigations
* **Defense Recommendations (Specific to Actor/Incident):**
* Remedial actions recommended by Mandiant were adopted by SonicWall to harden network and cloud infrastructure.
* SonicWall customers were advised to log in to MySonicWall.com, **check for their devices**, and **reset credentials** for impacted services.
* SonicWall released an Online Analysis Tool and a Credentials Reset Tool to assist customers with remediation.