# MA-1373.082025: MyCERT Advisory - Akira Ransomware Campaign Exploiting SonicWall SSL VPN Zero - Day Vulnerability

**Date:** 05 Aug 2025  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-1373.082025  
**Advisory ID:** MA-1373.082025

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**1.0 Introduction**
Recently, Artic Wolf has observed a significant campaign by the Akira ransomware group is exploiting a likely zero-day vulnerability in SonicWall SSL VPN devices.
**2.0 Impact**
The attackers are achieving rapid network compromise, bypassing even MFA protections, and deploying ransomware within minutes of initial access. Even fully patched SonicWall appliances appear to be at risk, and conventional authentication mechanisms may be bypassed.
**3.0 Affected System**
- SonicWall firewall appliances with SSL VPN functionality enabled.
- All versions are potentially affected, regardless of patch status.
**4.0 Suspicious Autonomous System Numbers (ASNs)**
- AS23470 – ReliableSite.Net LLC
- AS215540 – Global Connectivity Solutions LLP
- AS64236 – UnReal Servers, LLC
- AS14315 – 1GSERVERS, LLC
- AS62240 – Clouvider Limited
**5.0 Recommendation**
CyberSecurity Malaysia urges users and organizations to review the security release, follow the Mitigation steps and apply the necessary updates. 
- Enhance Security Monitoring:
- Enable full VPN access logging and alerting.
- Deploy Endpoint Detection and Response (EDR) tools across all endpoints.
- Use centralized threat monitoring services to detect suspicious post-access behavior
- Review Authentication Activity:
- Audit login history for signs of unusual access patterns or bypass of MFA.
- Check for successful logins shortly after credential resets or updates.
- Enable Security Services: Activate services such as Botnet Protection to help detect threat actors targeting SSL VPN endpoints.
- Enforce Multi-Factor Authentication (MFA): Ensure MFA is enabled for all remote access to reduce credential abuse risk.
- Remove Unused Accounts: Delete inactive or unused local firewall user accounts, especially those with SSL VPN access.
- Practice Good Password Hygiene: Encourage regular password changes across all accounts to prevent reuse and brute-force exploitation.
- Stay subscribed to SonicWall advisories for updates.
Kindly refer to the URL for more information:  
- <https://arcticwolf.com/resources/blog/arctic-wolf-observes-july-2025-uptick-in-akira-ransomware-activity-targeting-sonicwall-ssl-vpn/>
Generally, Cyber999 advises the users of these devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact Cyber999 through the following channels:
E-mail: cyber999[at]cybersecurity.my 
Phone: 1-300-88-2999 (monitored during business hours) 
Mobile: +60 19 2665850 (24x7 call incident reporting) 
Business Hours: Mon - Fri 08:30 -17.30 MYT 
Web: [https://www.cybersecurity.my](https://www.cybersecurity.my/)
**5.0 References**
- <https://arcticwolf.com/resources/blog/arctic-wolf-observes-july-2025-uptick-in-akira-ransomware-activity-targeting-sonicwall-ssl-vpn/>